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Santiesteban SN, Li S, Abrams D, Alsalmi S, Androic D, Aniol K, Arrington J, Averett T, Ayerbe Gayoso C, Bane J, Barcus S, Barrow J, Beck A, Bellini V, Bhatt H, Bhetuwal D, Biswas D, Camsonne A, Castellanos J, Chen J, Chen JP, Chrisman D, Christy ME, Clarke C, Covrig S, Cruz-Torres R, Day D, Dutta D, Fuchey E, Gal C, Garibaldi F, Gautam TN, Gogami T, Gomez J, Guèye P, Hague TJ, Hansen JO, Hauenstein F, Henry W, Higinbotham DW, Holt RJ, Hyde C, Itabashi K, Kaneta M, Karki A, Katramatou AT, Keppel CE, King PM, Kurbany L, Kutz T, Lashley-Colthirst N, Li WB, Liu H, Liyanage N, Long E, Lovato A, Mammei J, Markowitz P, McClellan RE, Meddi F, Meekins D, Michaels R, Mihovilovič M, Moyer A, Nagao S, Nguyen D, Nycz M, Olson M, Ou L, Owen V, Palatchi C, Pandey B, Papadopoulou A, Park S, Petkovic T, Premathilake S, Punjabi V, Ransome RD, Reimer PE, Reinhold J, Riordan S, Rocco N, Rodriguez VM, Schmidt A, Schmookler B, Segarra EP, Shahinyan A, Širca S, Slifer K, Solvignon P, Su T, Suleiman R, Tang L, Tian Y, Tireman W, Tortorici F, Toyama Y, Uehara K, Urciuoli GM, Votaw D, Williamson J, Wojtsekhowski B, Wood S, Ye ZH, Zhang J, Zheng X. Novel Measurement of the Neutron Magnetic Form Factor from A=3 Mirror Nuclei. Phys Rev Lett 2024; 132:162501. [PMID: 38701469 DOI: 10.1103/physrevlett.132.162501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 10/05/2023] [Accepted: 02/21/2024] [Indexed: 05/05/2024]
Abstract
The electromagnetic form factors of the proton and neutron encode information on the spatial structure of their charge and magnetization distributions. While measurements of the proton are relatively straightforward, the lack of a free neutron target makes measurements of the neutron's electromagnetic structure more challenging and more sensitive to experimental or model-dependent uncertainties. Various experiments have attempted to extract the neutron form factors from scattering from the neutron in deuterium, with different techniques providing different, and sometimes large, systematic uncertainties. We present results from a novel measurement of the neutron magnetic form factor using quasielastic scattering from the mirror nuclei ^{3}H and ^{3}He, where the nuclear effects are larger than for deuterium but expected to largely cancel in the cross-section ratios. We extracted values of the neutron magnetic form factor for low-to-modest momentum transfer, 0.6
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Affiliation(s)
| | - S Li
- University of New Hampshire, Durham, New Hampshire 03824, USA
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - D Abrams
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Alsalmi
- Kent State University, Kent, Ohio 44240, USA
- King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - D Androic
- University of Zagreb, Zagreb, Croatia
| | - K Aniol
- California State University, Los Angeles, California 90032, USA
| | - J Arrington
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - T Averett
- William and Mary, Williamsburg, Virginia 23185, USA
| | | | - J Bane
- University of Tennessee, Knoxville, Tennessee 37966, USA
| | - S Barcus
- William and Mary, Williamsburg, Virginia 23185, USA
| | - J Barrow
- University of Tennessee, Knoxville, Tennessee 37966, USA
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Beck
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | - H Bhatt
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - D Bhetuwal
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - D Biswas
- Hampton University, Hampton, Virginia 23669, USA
| | - A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Castellanos
- Florida International University, Miami, Florida 33199, USA
| | - J Chen
- William and Mary, Williamsburg, Virginia 23185, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Chrisman
- Michigan State University, East Lansing, Michigan 48824, USA
| | - M E Christy
- Hampton University, Hampton, Virginia 23669, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Clarke
- Stony Brook, State University of New York, New York 11794, USA
| | - S Covrig
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Cruz-Torres
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D Dutta
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - E Fuchey
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - C Gal
- University of Virginia, Charlottesville, Virginia 22904, USA
| | | | - T N Gautam
- Hampton University, Hampton, Virginia 23669, USA
| | - T Gogami
- Tohoku University, Sendai, Japan
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Guèye
- Hampton University, Hampton, Virginia 23669, USA
- Michigan State University, East Lansing, Michigan 48824, USA
| | - T J Hague
- Kent State University, Kent, Ohio 44240, USA
| | - J O Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - F Hauenstein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - W Henry
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R J Holt
- Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - C Hyde
- Old Dominion University, Norfolk, Virginia 23529, USA
| | | | - M Kaneta
- Tohoku University, Sendai, Japan
| | - A Karki
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | | | - C E Keppel
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P M King
- Ohio University, Athens, Ohio 45701, USA
| | - L Kurbany
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - T Kutz
- Stony Brook, State University of New York, New York 11794, USA
| | | | - W B Li
- William and Mary, Williamsburg, Virginia 23185, USA
| | - H Liu
- Columbia University, New York, New York 10027, USA
| | - N Liyanage
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Long
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - A Lovato
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Computational Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- INFN-TIFPA Trento Institute for Fundamental Physics and Applications, 38123 Trento, Italy
| | - J Mammei
- University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - R E McClellan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Mihovilovič
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana, Slovenia
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany
| | - A Moyer
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - S Nagao
- Tohoku University, Sendai, Japan
| | - D Nguyen
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - M Nycz
- Kent State University, Kent, Ohio 44240, USA
| | - M Olson
- Saint Norbert College, De Pere, Wisconsin 54115, USA
| | - L Ou
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Owen
- William and Mary, Williamsburg, Virginia 23185, USA
| | - C Palatchi
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - B Pandey
- Hampton University, Hampton, Virginia 23669, USA
| | - A Papadopoulou
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Park
- Stony Brook, State University of New York, New York 11794, USA
| | | | - S Premathilake
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23529, USA
| | - R D Ransome
- Rutgers University, New Brunswick, New Jersey 08854, USA
| | - P E Reimer
- Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - J Reinhold
- Florida International University, Miami, Florida 33199, USA
| | - S Riordan
- Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - N Rocco
- Theoretical Physics Department, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - V M Rodriguez
- División de Ciencias y Tecnología, Universidad Ana G. Méndez, Recinto de Cupey, San Juan 00926, Puerto Rico
| | - A Schmidt
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Schmookler
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - E P Segarra
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | - S Širca
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - K Slifer
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - P Solvignon
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - T Su
- Kent State University, Kent, Ohio 44240, USA
| | - R Suleiman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - L Tang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Y Tian
- Syracuse University, Syracuse, New York 13244, USA
| | - W Tireman
- Northern Michigan University, Marquette, Michigan 49855, USA
| | | | - Y Toyama
- Tohoku University, Sendai, Japan
| | - K Uehara
- Tohoku University, Sendai, Japan
| | | | - D Votaw
- Michigan State University, East Lansing, Michigan 48824, USA
| | - J Williamson
- University of Glasgow, Glasgow, G12 8QQ Scotland, United Kingdom
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z H Ye
- Argonne National Laboratory, Lemont, Illinois 60439, USA
- Tsinghua University, Beijing, China
| | - J Zhang
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22904, USA
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Itabashi K, Suzuki K, Pandey B, Okuyama K, Gogami T, Nagao S, Nakamura S, Tang L, Abrams D, Akiyama T, Androic D, Aniol K, Ayerbe Gayoso C, Bane J, Barcus S, Barrow J, Bellini V, Bhatt H, Bhetuwal D, Biswas D, Camsonne A, Castellanos J, Chen JP, Chen J, Covrig S, Chrisman D, Cruz-Torres R, Das R, Fuchey E, Gnanvo K, Garibaldi F, Gautam T, Gomez J, Gueye P, Hague T, Hansen O, Henry W, Hauenstein F, Higinbotham D, Hyde C, Kaneta M, Keppel C, Kutz T, Lashley-Colthirst N, Li S, Liu H, Mammei J, Markowitz P, McClellan RE, Meddi F, Meekins D, Michaels R, Mihovilovic M, Moyer A, Nguyen D, Nycz M, Owen V, Palatchi C, Park S, Petkovic T, Premathilake S, Reimer P, Reinhold J, Riordan S, Rodriguez V, Samanta C, Santiesteban S, Sawatzky B, Širca S, Slifer K, Su T, Tian Y, Toyama Y, Uehara K, Urciuoli G, Votaw D, Williamson J, Wojtsekhowski B, Wood S, Yale B, Ye Z, Zhang J, Zheng X. Study of Λ n FSI with Λ quasi-free productions on the 3H( e, e′K+) X reaction at JLab. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202227102006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract. An nnΛ is a neutral baryon system with no charge. The study of the pure Λ-neutron system such as nnΛ gives us information on the Λn interaction. The nnΛ search experiment (E12-17-003) was performed at JLab Hall A in 2018. In this article, the Λn FSI was investigated by a shape analysis of the 3H(e, e′K+)X missing mass spectrum, and a preliminary result for the Λn FSI study is given.
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Gogami T, Suzuki KN, Pandey B, Itabashi K, Nagao S, Okuyama K, Nakamura SN, Tang L, Abrams D, Akiyama T, Androic D, Aniol K, Ayerbe Gayoso C, Bane J, Barcus S, Barrow J, Bellini V, Bhatt H, Bhetuwal D, Biswas D, Camsonne A, Castellanos J, Chen JP, Chen J, Covrig S, Chrisman D, Cruz-Torres R, Das R, Fuchey E, Gnanvo K, Garibaldi F, Gautam T, Gomez J, Gueye P, Hague TJ, Hansen O, Henry W, Hauenstein F, Higinbotham DW, Hyde CE, Kaneta M, Keppel C, Kutz T, Lashley-Colthirst N, Li S, Liu H, Mammei J, Markowitz P, McClellan RE, Meddi F, Meekins D, Michaels R, Mihovilovic M, Moyer A, Nguyen D, Nycz M, Owen V, Palatchi C, Park S, Petkovic T, Premathilake S, Reimer PE, Reinhold J, Riordan S, Rodriguez V, Samanta C, Santiesteban SN, Sawatzky B, Širca S, Slifer K, Su T, Tian Y, Toyama Y, Uehara K, Urciuoli GM, Votaw D, Williamson J, Wojtsekhowski B, Wood SA, Yale B, Ye Z, Zhang J, Zheng X. Cross-section measurement of virtual photoproduction of iso-triplet three-body hypernucleus, Λ nn. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202227102002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Missing-mass spectroscopy with the 3H(e, e′K+) reaction was carried out at Jefferson Lab’s (JLab) Hall A in Oct–Nov, 2018. The differential cross section for the 3H(γ∗, K+)Λnn was deduced at ω = Ee − Ee′ = 2.102 GeV and at the forward K+-scattering angle (0° ≤ θγ∗K ≤ 5°) in the laboratory frame. Given typical predicted energies and decay widths, which are (BΛ, Γ) = (−0.25, 0.8) and (−0.55, 4.7) MeV, the cross sections were found to be 11.2 ± 4.8(stat.)+4.1−2.1(sys.) and 18.1 ± 6.8(stat.)+4.2−2.9(sys.) nb/sr, respectively. The obtained result would impose a constraint for interaction models particularly between Λ and neutron by comparing to theoretical calculations.
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Okuyama K, Itabashi K, Nagao S, Nakamura SN, Suzuki KN, Gogami T, Pandey B, Tang L, Abrams D, Akiyama T, Androic D, Aniol K, Ayerbe Gayoso C, Bane J, Barcus S, Barrow J, Bellini V, Bhatt H, Bhetuwal D, Biswas D, Camsonne A, Castellanos J, Chen JP, Chen J, Covrig S, Chrisman D, Cruz-Torres R, Das R, Fuchey E, Gnanvo K, Garibaldi F, Gautam T, Gomez J, Gueye P, Hague TJ, Hansen O, Henry W, Hauenstein F, Higinbotham DW, Hyde CE, Kaneta M, Keppel C, Kutz T, Lashley-Colthirst N, Li S, Liu H, Mammei J, Markowitz P, McClellan RE, Meddi F, Meekins D, Michaels R, Mihovilovic M, Moyer A, Nguyen D, Nycz M, Owen V, Palatchi C, Park S, Petkovic T, Premathilake S, Reimer PE, Reinhold J, Riordan S, Rodriguez V, Samanta C, Santiesteban SN, Sawatzky B, Širca S, Slifer K, Su T, Tian Y, Toyama Y, Uehara K, Urciuoli GM, Votaw D, Williamson J, Wojtsekhowski B, Wood SA, Yale B, Ye Z, Zhang J, Zheng X. Study of the Λ/Σ 0 electroproduction in the low- Q2 region at JLab. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202227102003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
We performed an experiment using tritium and hydrogen cryogenic gas targets at Thomas Jefferson National Accelerator Facility (JLab) in 2018 (E12-17-003)[1, 2]. In this article, we discuss the Λ/Σ0 hyperon electroproduction from hydrogen target. Elementary Λ/Σ0 hyperon production processes are important not only for an absolute mass scale calibration in our experiment, but also for the study of the electroproduction mechanisms themselves. In this article, we reported the results of the differential cross section for the p(e, e’K+)Λ/Σ0 reaction at Q2 ∼ 0.5 (GeV/c)2.
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Albayrak I, Mamyan V, Christy ME, Ahmidouch A, Arrington J, Asaturyan A, Bodek A, Bosted P, Bradford R, Brash E, Bruell A, Butuceanu C, Coleman SJ, Commisso M, Connell SH, Dalton MM, Danagoulian S, Daniel A, Day DB, Dhamija S, Dunne J, Dutta D, Ent R, Gaskell D, Gasparian A, Gran R, Horn T, Huang L, Huber GM, Jayalath C, Johnson M, Jones MK, Kalantarians N, Liyanage A, Keppel CE, Kinney E, Li Y, Malace S, Manly S, Markowitz P, Maxwell J, Mbianda NN, McFarland KS, Meziane M, Meziani ZE, Mills GB, Mkrtchyan H, Mkrtchyan A, Mulholland J, Nelson J, Niculescu G, Niculescu I, Pentchev L, Puckett A, Punjabi V, Qattan IA, Reimer PE, Reinhold J, Rodriguez VM, Rondon-Aramayo O, Sakuda M, Sakumoto WK, Segbefia E, Seva T, Sick I, Slifer K, Smith GR, Steinman J, Solvignon P, Tadevosyan V, Tajima S, Tvaskis V, Vulcan WF, Walton T, Wesselmann FR, Wood SA, Ye Z. Measurements of Nonsinglet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for Q^{2}=4 GeV^{2}. Phys Rev Lett 2019; 123:022501. [PMID: 31386522 DOI: 10.1103/physrevlett.123.022501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 04/10/2019] [Indexed: 06/10/2023]
Abstract
We present extractions of the nucleon nonsinglet moments utilizing new precision data on the deuteron F_{2} structure function at large Bjorken-x determined via the Rosenbluth separation technique at Jefferson Lab Experimental Hall C. These new data are combined with a complementary set of data on the proton previously measured in Hall C at similar kinematics and world datasets on the proton and deuteron at lower x measured at SLAC and CERN. The new Jefferson Lab data provide coverage of the upper third of the x range, crucial for precision determination of the higher moments. In contrast to previous extractions, these moments have been corrected for nuclear effects in the deuteron using a new global fit to the deuteron and proton data. The obtained experimental moments represent an order of magnitude improvement in precision over previous extractions using high x data. Moreover, recent exciting developments in lattice QCD calculations provide a first ever comparison of these new experimental results with calculations of moments carried out at the physical pion mass, as well as a new approach that first calculates the quark distributions directly before determining moments.
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Affiliation(s)
- I Albayrak
- Hampton University, Hampton, Virginia 23668, USA
- Catholic University of America, Washington, DC 20064, USA
| | - V Mamyan
- University of Chicago, Chicago, Illinois 60637, USA
| | - M E Christy
- Hampton University, Hampton, Virginia 23668, USA
| | - A Ahmidouch
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - J Arrington
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Asaturyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - A Bodek
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - P Bosted
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - R Bradford
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - E Brash
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - A Bruell
- DFG, German Research Foundation, Bonn 51170, Germany
| | - C Butuceanu
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - S J Coleman
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - M Commisso
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S H Connell
- University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa
| | - M M Dalton
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Danagoulian
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - A Daniel
- University of Houston, Houston, Texas 77004, USA
| | - D B Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Dhamija
- Florida International University, Miami, Florida 33199, USA
| | - J Dunne
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - D Dutta
- Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - R Ent
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Gaskell
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Gasparian
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - R Gran
- Department of Physics, University of Minnesota-Duluth, Duluth, Minnesota 55812, USA
| | - T Horn
- Catholic University of America, Washington, DC 20064, USA
| | - Liting Huang
- Hampton University, Hampton, Virginia 23668, USA
| | - G M Huber
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - C Jayalath
- Hampton University, Hampton, Virginia 23668, USA
| | - M Johnson
- Argonne National Laboratory, Argonne, Illinois 60439, USA
- Northwestern University, Evanston, Illinois 60208, USA
| | - M K Jones
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Kalantarians
- Virginia Union University, Richmond, Virginia 23220, USA
| | - A Liyanage
- Hampton University, Hampton, Virginia 23668, USA
| | - C E Keppel
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Kinney
- University of Colorado, Boulder, Colorado 80309, USA
| | - Y Li
- Hampton University, Hampton, Virginia 23668, USA
| | - S Malace
- Duke University, Department of Physics, Box 90305, Durham, North Carolina 27708
| | - S Manly
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - J Maxwell
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - N N Mbianda
- University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa
| | - K S McFarland
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - M Meziane
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - Z E Meziani
- Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - G B Mills
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - H Mkrtchyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - A Mkrtchyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - J Mulholland
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Nelson
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - G Niculescu
- James Madison University, Harrisonburg, Virginia 22801, USA
| | - I Niculescu
- James Madison University, Harrisonburg, Virginia 22801, USA
| | - L Pentchev
- Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA
| | - A Puckett
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - I A Qattan
- Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - P E Reimer
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Reinhold
- Florida International University, Miami, Florida 33199, USA
| | | | | | - M Sakuda
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - W K Sakumoto
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - E Segbefia
- Hampton University, Hampton, Virginia 23668, USA
| | - T Seva
- University of Zagreb, Zagreb 10000, Croatia
| | - I Sick
- University of Basel, CH-4056 Basel, Switzerland
| | - K Slifer
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - G R Smith
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Steinman
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - V Tadevosyan
- Yerevan Physics Institute, Yerevan 0036, Armenia
| | - S Tajima
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Tvaskis
- University of Winnipeg, Winnipeg, Manitoba R3B 2E9, Canada
| | - W F Vulcan
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Walton
- Hampton University, Hampton, Virginia 23668, USA
| | | | - S A Wood
- Thomas Jeferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Zhihong Ye
- Hampton University, Hampton, Virginia 23668, USA
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6
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Armstrong W, Kang H, Liyanage A, Maxwell J, Mulholland J, Ndukum L, Ahmidouch A, Albayrak I, Asaturyan A, Ates O, Baghdasaryan H, Boeglin W, Bosted P, Brash E, Butuceanu C, Bychkov M, Carter P, Chen C, Chen JP, Choi S, Christy ME, Covrig S, Crabb D, Danagoulian S, Daniel A, Davidenko AM, Davis B, Day D, Deconinck W, Deur A, Dunne J, Dutta D, El Fassi L, Ellis C, Ent R, Flay D, Frlez E, Gaskell D, Geagla O, German J, Gilman R, Gogami T, Gomez J, Goncharenko YM, Hashimoto O, Higinbotham D, Horn T, Huber GM, Jones M, Jones MK, Kalantarians N, Kang HK, Kawama D, Keith C, Keppel C, Khandaker M, Kim Y, King PM, Kohl M, Kovacs K, Kubarovsky V, Li Y, Liyanage N, Luo W, Mack D, Mamyan V, Markowitz P, Maruta T, Meekins D, Melnik YM, Meziani ZE, Mkrtchyan A, Mkrtchyan H, Mochalov VV, Monaghan P, Narayan A, Nakamura SN, Nuruzzaman A, Pentchev L, Pocanic D, Posik M, Puckett A, Qiu X, Reinhold J, Riordan S, Roche J, Rondón OA, Sawatzky B, Shabestari M, Slifer K, Smith G, Soloviev LF, Solvignon P, Tadevosyan V, Tang L, Vasiliev AN, Veilleux M, Walton T, Wesselmann F, Wood S, Yao H, Ye Z, Zhang J, Zhu L. Revealing Color Forces with Transverse Polarized Electron Scattering. Phys Rev Lett 2019; 122:022002. [PMID: 30720291 DOI: 10.1103/physrevlett.122.022002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 10/18/2018] [Indexed: 06/09/2023]
Abstract
The Spin Asymmetries of the Nucleon Experiment measured two double spin asymmetries using a polarized proton target and polarized electron beam at two beam energies, 4.7 and 5.9 GeV. A large-acceptance open-configuration detector package identified scattered electrons at 40° and covered a wide range in Bjorken x (0.3<x<0.8). Proportional to an average color Lorentz force, the twist-3 matrix element, d[over ˜]_{2}^{p}, was extracted from the measured asymmetries at Q^{2} values ranging from 2.0 to 6.0 GeV^{2}. The data display the opposite sign compared to most quark models, including the lattice QCD result, and an unexpected scale dependence. Furthermore, when combined with the neutron data in the same Q^{2} range the results suggest a flavor independent average color Lorentz force.
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Affiliation(s)
- W Armstrong
- Temple University, Philadelphia, Pennsylvania 19122, USA
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - H Kang
- Seoul National University, Seoul, South Korea
| | - A Liyanage
- Hampton University, Hampton, Virginia 23669, USA
| | - J Maxwell
- University of Virginia, Charlottesville, Virginia 22904, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Mulholland
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L Ndukum
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - A Ahmidouch
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - I Albayrak
- Hampton University, Hampton, Virginia 23669, USA
| | - A Asaturyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - O Ates
- Hampton University, Hampton, Virginia 23669, USA
| | - H Baghdasaryan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33199, USA
| | - P Bosted
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Brash
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - C Butuceanu
- University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
| | - M Bychkov
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Carter
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - C Chen
- Hampton University, Hampton, Virginia 23669, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Choi
- Seoul National University, Seoul, South Korea
| | - M E Christy
- Hampton University, Hampton, Virginia 23669, USA
| | - S Covrig
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Crabb
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Danagoulian
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - A Daniel
- Ohio University, Athens, Ohio 45701, USA
| | - A M Davidenko
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - B Davis
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - D Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Deconinck
- William & Mary, Williamsburg, Virginia 23185, USA
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Dunne
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - D Dutta
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - L El Fassi
- Mississippi State University, Starkville, Mississippi 39759, USA
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - C Ellis
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Ent
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Flay
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - E Frlez
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D Gaskell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - O Geagla
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J German
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - R Gilman
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - T Gogami
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - O Hashimoto
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - D Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Horn
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - G M Huber
- University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
| | - M Jones
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - M K Jones
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Kalantarians
- University of Virginia, Charlottesville, Virginia 22904, USA
- Virginia Union University, Richmond, Virginia 23220, USA
| | - H-K Kang
- Seoul National University, Seoul, South Korea
| | - D Kawama
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - C Keith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Keppel
- Hampton University, Hampton, Virginia 23669, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Khandaker
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - Y Kim
- Seoul National University, Seoul, South Korea
| | - P M King
- Ohio University, Athens, Ohio 45701, USA
| | - M Kohl
- Hampton University, Hampton, Virginia 23669, USA
| | - K Kovacs
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - Y Li
- Hampton University, Hampton, Virginia 23669, USA
| | - N Liyanage
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Luo
- Lanzhou University, Lanzhou, Gansu Sheng, China
| | - D Mack
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - V Mamyan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - T Maruta
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Y M Melnik
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - Z-E Meziani
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - A Mkrtchyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - H Mkrtchyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - V V Mochalov
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - P Monaghan
- Hampton University, Hampton, Virginia 23669, USA
| | - A Narayan
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - S N Nakamura
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - A Nuruzzaman
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - L Pentchev
- William & Mary, Williamsburg, Virginia 23185, USA
| | - D Pocanic
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - M Posik
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - A Puckett
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - X Qiu
- Hampton University, Hampton, Virginia 23669, USA
| | - J Reinhold
- Florida International University, Miami, Florida 33199, USA
| | - S Riordan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Roche
- Ohio University, Athens, Ohio 45701, USA
| | - O A Rondón
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - B Sawatzky
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - M Shabestari
- University of Virginia, Charlottesville, Virginia 22904, USA
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - K Slifer
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - G Smith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - L F Soloviev
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - V Tadevosyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - L Tang
- Hampton University, Hampton, Virginia 23669, USA
| | - A N Vasiliev
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - M Veilleux
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - T Walton
- Hampton University, Hampton, Virginia 23669, USA
| | - F Wesselmann
- Xavier University, New Orleans, Louisiana 70125, USA
| | - S Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Yao
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Z Ye
- Hampton University, Hampton, Virginia 23669, USA
| | - J Zhang
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L Zhu
- Hampton University, Hampton, Virginia 23669, USA
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7
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Adhikari KP, Deur A, El Fassi L, Kang H, Kuhn SE, Ripani M, Slifer K, Zheng X, Adhikari S, Akbar Z, Amaryan MJ, Avakian H, Ball J, Balossino I, Barion L, Battaglieri M, Bedlinskiy I, Biselli AS, Bosted P, Briscoe WJ, Brock J, Bültmann S, Burkert VD, Thanh Cao F, Carlin C, Carman DS, Celentano A, Charles G, Chen JP, Chetry T, Choi S, Ciullo G, Clark L, Cole PL, Contalbrigo M, Crede V, D'Angelo A, Dashyan N, De Vita R, De Sanctis E, Defurne M, Djalali C, Dodge GE, Drozdov V, Dupre R, Egiyan H, El Alaoui A, Elouadrhiri L, Eugenio P, Fedotov G, Filippi A, Ghandilyan Y, Gilfoyle GP, Golovatch E, Gothe RW, Griffioen KA, Guidal M, Guler N, Guo L, Hafidi K, Hakobyan H, Hanretty C, Harrison N, Hattawy M, Heddle D, Hicks K, Holtrop M, Hyde CE, Ilieva Y, Ireland DG, Isupov EL, Jenkins D, Jo HS, Johnston SC, Joo K, Joosten S, Kabir ML, Keith CD, Keller D, Khachatryan G, Khachatryan M, Khandaker M, Kim W, Klein A, Klein FJ, Konczykowski P, Kovacs K, Kubarovsky V, Lanza L, Lenisa P, Livingston K, Long E, MacGregor IJD, Markov N, Mayer M, McKinnon B, Meekins DG, Meyer CA, Mineeva T, Mirazita M, Mokeev V, Movsisyan A, Munoz Camacho C, Nadel-Turonski P, Niculescu G, Niccolai S, Osipenko M, Ostrovidov AI, Paolone M, Pappalardo L, Paremuzyan R, Park K, Pasyuk E, Payette D, Phelps W, Phillips SK, Pierce J, Pogorelko O, Poudel J, Price JW, Prok Y, Protopopescu D, Raue BA, Rizzo A, Rosner G, Rossi P, Sabatié F, Salgado C, Schumacher RA, Sharabian YG, Shigeyuki T, Simonyan A, Skorodumina I, Smith GD, Sparveris N, Sokhan D, Stepanyan S, Strakovsky II, Strauch S, Sulkosky V, Taiuti M, Tan JA, Ungaro M, Voutier E, Wei X, Weinstein LB, Zhang J, Zhao ZW. Measurement of the Q^{2} Dependence of the Deuteron Spin Structure Function g_{1} and its Moments at Low Q^{2} with CLAS. Phys Rev Lett 2018; 120:062501. [PMID: 29481214 DOI: 10.1103/physrevlett.120.062501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/05/2017] [Indexed: 06/08/2023]
Abstract
We measured the g_{1} spin structure function of the deuteron at low Q^{2}, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ_{1}^{d} and the spin polarizability γ_{0}^{d} are precisely determined down to a minimum Q^{2} of 0.02 GeV^{2} for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.
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Affiliation(s)
- K P Adhikari
- Old Dominion University, Norfolk, Virginia 23529, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Mississippi State University, Mississippi State, Mississippi 39762-5167, USA
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - L El Fassi
- Old Dominion University, Norfolk, Virginia 23529, USA
- Mississippi State University, Mississippi State, Mississippi 39762-5167, USA
| | - H Kang
- Seoul National University, Seoul, Korea
| | - S E Kuhn
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - M Ripani
- INFN, Sezione di Genova, 16146 Genova, Italy
| | - K Slifer
- University of Virginia, Charlottesville, Virginia 22901, USA
- University of New Hampshire, Durham, New Hampshire 03824-3568, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - S Adhikari
- Florida International University, Miami, Florida 33199, USA
| | - Z Akbar
- Florida State University, Tallahassee, Florida 32306, USA
| | - M J Amaryan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - H Avakian
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Ball
- IRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - I Balossino
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
| | - L Barion
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
| | | | - I Bedlinskiy
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
| | - A S Biselli
- Fairfield University, Fairfield, Connecticut 06824, USA
| | - P Bosted
- College of William and Mary, Williamsburg, Virginia 23187-8795, USA
| | - W J Briscoe
- The George Washington University, Washington, DC 20052, USA
| | - J Brock
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Bültmann
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - V D Burkert
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - F Thanh Cao
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - C Carlin
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D S Carman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Celentano
- INFN, Sezione di Genova, 16146 Genova, Italy
| | - G Charles
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Chetry
- Ohio University, Athens, Ohio 45701, USA
| | - S Choi
- Seoul National University, Seoul, Korea
| | - G Ciullo
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
| | - L Clark
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - P L Cole
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Idaho State University, Pocatello, Idaho 83209, USA
| | | | - V Crede
- Florida State University, Tallahassee, Florida 32306, USA
| | - A D'Angelo
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
- Universita' di Roma Tor Vergata, 00133 Rome Italy
| | - N Dashyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
| | - R De Vita
- INFN, Sezione di Genova, 16146 Genova, Italy
| | - E De Sanctis
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - M Defurne
- IRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - C Djalali
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - G E Dodge
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - V Drozdov
- INFN, Sezione di Genova, 16146 Genova, Italy
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - R Dupre
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
| | - H Egiyan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- University of New Hampshire, Durham, New Hampshire 03824-3568, USA
| | - A El Alaoui
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - L Elouadrhiri
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Eugenio
- Florida State University, Tallahassee, Florida 32306, USA
| | - G Fedotov
- Ohio University, Athens, Ohio 45701, USA
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - A Filippi
- INFN, Sezione di Torino, 10125 Torino, Italy
| | - Y Ghandilyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
| | - G P Gilfoyle
- University of Richmond, Richmond, Virginia 23173, USA
| | - E Golovatch
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - R W Gothe
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - K A Griffioen
- College of William and Mary, Williamsburg, Virginia 23187-8795, USA
| | - M Guidal
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
| | - N Guler
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - L Guo
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Florida International University, Miami, Florida 33199, USA
| | - K Hafidi
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - H Hakobyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - C Hanretty
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Harrison
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Hattawy
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Heddle
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - K Hicks
- Ohio University, Athens, Ohio 45701, USA
| | - M Holtrop
- University of New Hampshire, Durham, New Hampshire 03824-3568, USA
| | - C E Hyde
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - Y Ilieva
- The George Washington University, Washington, DC 20052, USA
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - D G Ireland
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - E L Isupov
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - D Jenkins
- Virginia Tech, Blacksburg, Virginia 24061-0435, USA
| | - H S Jo
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
| | - S C Johnston
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - K Joo
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - S Joosten
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - M L Kabir
- Mississippi State University, Mississippi State, Mississippi 39762-5167, USA
| | - C D Keith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Keller
- University of Virginia, Charlottesville, Virginia 22901, USA
| | | | - M Khachatryan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - M Khandaker
- Idaho State University, Pocatello, Idaho 83209, USA
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - W Kim
- Kyungpook National University, Daegu 41566, Republic of Korea
| | - A Klein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - F J Klein
- Catholic University of America, Washington, DC 20064, USA
| | - P Konczykowski
- IRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - K Kovacs
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - V Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
| | - L Lanza
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
| | - P Lenisa
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
| | - K Livingston
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - E Long
- University of New Hampshire, Durham, New Hampshire 03824-3568, USA
| | | | - N Markov
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - M Mayer
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - B McKinnon
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D G Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C A Meyer
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - T Mineeva
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - M Mirazita
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - V Mokeev
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - A Movsisyan
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
| | - C Munoz Camacho
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
| | - P Nadel-Turonski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- The George Washington University, Washington, DC 20052, USA
| | - G Niculescu
- Ohio University, Athens, Ohio 45701, USA
- James Madison University, Harrisonburg, Virginia 22807, USA
| | - S Niccolai
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
| | - M Osipenko
- INFN, Sezione di Genova, 16146 Genova, Italy
| | - A I Ostrovidov
- Florida State University, Tallahassee, Florida 32306, USA
| | - M Paolone
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - L Pappalardo
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- Università di Ferrara, 44121 Ferrara, Italy
| | - R Paremuzyan
- University of New Hampshire, Durham, New Hampshire 03824-3568, USA
| | - K Park
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Kyungpook National University, Daegu 41566, Republic of Korea
| | - E Pasyuk
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Arizona State University, Tempe, Arizona 85287-1504, USA
| | - D Payette
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - W Phelps
- Florida International University, Miami, Florida 33199, USA
| | - S K Phillips
- University of New Hampshire, Durham, New Hampshire 03824-3568, USA
| | - J Pierce
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - O Pogorelko
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
| | - J Poudel
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - J W Price
- California State University, Dominguez Hills, Carson, California 90747, USA
| | - Y Prok
- Old Dominion University, Norfolk, Virginia 23529, USA
- University of Virginia, Charlottesville, Virginia 22901, USA
| | | | - B A Raue
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Florida International University, Miami, Florida 33199, USA
| | - A Rizzo
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
- Universita' di Roma Tor Vergata, 00133 Rome Italy
| | - G Rosner
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - P Rossi
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - F Sabatié
- IRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - C Salgado
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - R A Schumacher
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - Y G Sharabian
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Shigeyuki
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - A Simonyan
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
| | - Iu Skorodumina
- University of South Carolina, Columbia, South Carolina 29208, USA
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - G D Smith
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
| | - N Sparveris
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - D Sokhan
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - S Stepanyan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - I I Strakovsky
- The George Washington University, Washington, DC 20052, USA
| | - S Strauch
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - V Sulkosky
- College of William and Mary, Williamsburg, Virginia 23187-8795, USA
| | - M Taiuti
- INFN, Sezione di Genova, 16146 Genova, Italy
- Università di Genova, Dipartimento di Fisica, 16146 Genova, Italy
| | - J A Tan
- Kyungpook National University, Daegu 41566, Republic of Korea
| | - M Ungaro
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
| | - E Voutier
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
| | - X Wei
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - L B Weinstein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - J Zhang
- Old Dominion University, Norfolk, Virginia 23529, USA
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - Z W Zhao
- Old Dominion University, Norfolk, Virginia 23529, USA
- University of South Carolina, Columbia, South Carolina 29208, USA
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8
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Fanelli C, Cisbani E, Hamilton DJ, Salmé G, Wojtsekhowski B, Ahmidouch A, Annand JRM, Baghdasaryan H, Beaufait J, Bosted P, Brash EJ, Butuceanu C, Carter P, Christy E, Chudakov E, Danagoulian S, Day D, Degtyarenko P, Ent R, Fenker H, Fowler M, Frlez E, Gaskell D, Gilman R, Horn T, Huber GM, de Jager CW, Jensen E, Jones MK, Kelleher A, Keppel C, Khandaker M, Kohl M, Kumbartzki G, Lassiter S, Li Y, Lindgren R, Lovelace H, Luo W, Mack D, Mamyan V, Margaziotis DJ, Markowitz P, Maxwell J, Mbianda G, Meekins D, Meziane M, Miller J, Mkrtchyan A, Mkrtchyan H, Mulholland J, Nelyubin V, Pentchev L, Perdrisat CF, Piasetzky E, Prok Y, Puckett AJR, Punjabi V, Shabestari M, Shahinyan A, Slifer K, Smith G, Solvignon P, Subedi R, Wesselmann FR, Wood S, Ye Z, Zheng X. Polarization Transfer in Wide-Angle Compton Scattering and Single-Pion Photoproduction from the Proton. Phys Rev Lett 2015; 115:152001. [PMID: 26550716 DOI: 10.1103/physrevlett.115.152001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Indexed: 06/05/2023]
Abstract
Wide-angle exclusive Compton scattering and single-pion photoproduction from the proton have been investigated via measurement of the polarization transfer from a circularly polarized photon beam to the recoil proton. The wide-angle Compton scattering polarization transfer was analyzed at an incident photon energy of 3.7 GeV at a proton scattering angle of θ_{cm}^{p}=70°. The longitudinal transfer K_{LL}, measured to be 0.645±0.059±0.048, where the first error is statistical and the second is systematic, has the same sign as predicted for the reaction mechanism in which the photon interacts with a single quark carrying the spin of the proton. However, the observed value is ~3 times larger than predicted by the generalized-parton-distribution-based calculations, which indicates a significant unknown contribution to the scattering amplitude.
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Affiliation(s)
- C Fanelli
- Dipartimento di Fisica, Università La Sapienza, Rome, Italy and INFN, Sezione di Roma, 00185 Rome, Italy
- INFN, Sezione di Roma, gruppo Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - E Cisbani
- INFN, Sezione di Roma, gruppo Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - D J Hamilton
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - G Salmé
- Dipartimento di Fisica, Università La Sapienza, Rome, Italy and INFN, Sezione di Roma, 00185 Rome, Italy
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Ahmidouch
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - J R M Annand
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - H Baghdasaryan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Beaufait
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Bosted
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E J Brash
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - C Butuceanu
- University of Regina, Regina, Saskatchewan S4S OA2, Canada
| | - P Carter
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - E Christy
- Hampton University, Hampton, Virginia 23668, USA
| | - E Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Danagoulian
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - D Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Degtyarenko
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Ent
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Fenker
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Fowler
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Frlez
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D Gaskell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - T Horn
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - G M Huber
- University of Regina, Regina, Saskatchewan S4S OA2, Canada
| | - C W de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Jensen
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - M K Jones
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Kelleher
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - C Keppel
- Hampton University, Hampton, Virginia 23668, USA
| | - M Khandaker
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - M Kohl
- Hampton University, Hampton, Virginia 23668, USA
| | - G Kumbartzki
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - S Lassiter
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Y Li
- Hampton University, Hampton, Virginia 23668, USA
| | - R Lindgren
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - H Lovelace
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - W Luo
- Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - D Mack
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - V Mamyan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D J Margaziotis
- California State University Los Angeles, Los Angeles, California 90032, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - J Maxwell
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - G Mbianda
- University of Witwatersrand, Johannesburg, South Africa
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Meziane
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - J Miller
- University of Maryland, College Park, Maryland 20742, USA
| | - A Mkrtchyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - H Mkrtchyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - J Mulholland
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Nelyubin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L Pentchev
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - C F Perdrisat
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - E Piasetzky
- University of Tel Aviv, Tel Aviv 6997801, Israel
| | - Y Prok
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - A J R Puckett
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - M Shabestari
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - K Slifer
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - G Smith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R Subedi
- University of Virginia, Charlottesville, Virginia 22904, USA
| | | | - S Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z Ye
- Hampton University, Hampton, Virginia 23668, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22904, USA
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9
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Korover I, Muangma N, Hen O, Shneor R, Sulkosky V, Kelleher A, Gilad S, Higinbotham DW, Piasetzky E, Watson JW, Wood SA, Aguilera P, Ahmed Z, Albataineh H, Allada K, Anderson B, Anez D, Aniol K, Annand J, Armstrong W, Arrington J, Averett T, Badman T, Baghdasaryan H, Bai X, Beck A, Beck S, Bellini V, Benmokhtar F, Bertozzi W, Bittner J, Boeglin W, Camsonne A, Chen C, Chen JP, Chirapatpimol K, Cisbani E, Dalton MM, Daniel A, Day D, de Jager CW, De Leo R, Deconinck W, Defurne M, Flay D, Fomin N, Friend M, Frullani S, Fuchey E, Garibaldi F, Gaskell D, Gilman R, Glamazdin O, Gu C, Gueye P, Hamilton D, Hanretty C, Hansen JO, Hashemi Shabestari M, Holmstrom T, Huang M, Iqbal S, Jin G, Kalantarians N, Kang H, Khandaker M, LeRose J, Leckey J, Lindgren R, Long E, Mammei J, Margaziotis DJ, Markowitz P, Marti Jimenez-Arguello A, Meekins D, Meziani Z, Michaels R, Mihovilovic M, Monaghan P, Munoz Camacho C, Norum B, Pan K, Phillips S, Pomerantz I, Posik M, Punjabi V, Qian X, Qiang Y, Qiu X, Rakhman A, Reimer PE, Riordan S, Ron G, Rondon-Aramayo O, Saha A, Schulte E, Selvy L, Shahinyan A, Sirca S, Sjoegren J, Slifer K, Solvignon P, Sparveris N, Subedi R, Tireman W, Wang D, Weinstein LB, Wojtsekhowski B, Yan W, Yaron I, Ye Z, Zhan X, Zhang J, Zhang Y, Zhao B, Zhao Z, Zheng X, Zhu P, Zielinski R. Probing the repulsive core of the nucleon-nucleon interaction via the (4)He(e,e'pN) triple-coincidence reaction. Phys Rev Lett 2014; 113:022501. [PMID: 25062168 DOI: 10.1103/physrevlett.113.022501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Indexed: 06/03/2023]
Abstract
We studied simultaneously the (4)He(e,e'p), (4)He(e,e'pp), and (4)He(e,e'pn) reactions at Q(2)=2(GeV/c)(2) and x(B)>1, for an (e,e'p) missing-momentum range of 400 to 830 MeV/c. The knocked-out proton was detected in coincidence with a proton or neutron recoiling almost back to back to the missing momentum, leaving the residual A=2 system at low excitation energy. These data were used to identify two-nucleon short-range correlated pairs and to deduce their isospin structure as a function of missing momentum, in a region where the nucleon-nucleon (NN) force is expected to change from predominantly tensor to repulsive. The abundance of neutron-proton pairs is reduced as the nucleon momentum increases beyond ∼500 MeV/c. The extracted fraction of proton-proton pairs is small and almost independent of the missing momentum. Our data are compared with calculations of two-nucleon momentum distributions in (4)He and discussed in the context of probing the elusive repulsive component of the NN force.
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Affiliation(s)
- I Korover
- Tel Aviv University, Tel Aviv 69978, Israel
| | - N Muangma
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - O Hen
- Tel Aviv University, Tel Aviv 69978, Israel
| | - R Shneor
- Tel Aviv University, Tel Aviv 69978, Israel
| | - V Sulkosky
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Longwood University, Farmville, Virginia 23909, USA
| | - A Kelleher
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Gilad
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - J W Watson
- Kent State University, Kent, Ohio 44242, USA
| | - S A Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Aguilera
- Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3-Université Paris-Sud, F-91406 Orsay Cedex, France
| | - Z Ahmed
- Syracuse University, Syracuse, New York 13244, USA
| | - H Albataineh
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - K Allada
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - B Anderson
- Kent State University, Kent, Ohio 44242, USA
| | - D Anez
- Saint Mary's University, Halifax, Nova Scotia, Canada
| | - K Aniol
- California State University, Los Angeles, Los Angeles, California 90032, USA
| | - J Annand
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - W Armstrong
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - J Arrington
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - T Averett
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - T Badman
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - H Baghdasaryan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Bai
- China Institute of Atomic Energy, Beijing, China
| | - A Beck
- Nuclear Research Center Negev, Beer-Sheva, Israel
| | - S Beck
- Nuclear Research Center Negev, Beer-Sheva, Israel
| | - V Bellini
- Universita di Catania, Catania, Italy
| | - F Benmokhtar
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - W Bertozzi
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Bittner
- Longwood University, Farmville, Virginia 23909, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33199, USA
| | - A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Chen
- Hampton University, Hampton, Virginia 23668, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - K Chirapatpimol
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Cisbani
- INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - M M Dalton
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Daniel
- Ohio University, Athens, Ohio 45701, USA
| | - D Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - C W de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and University of Virginia, Charlottesville, Virginia 22904, USA
| | - R De Leo
- INFN, Sezione di Bari and University of Bari, I-70126 Bari, Italy
| | - W Deconinck
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Defurne
- CEA Saclay, F-91191 Gif-sur-Yvette, France
| | - D Flay
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - N Fomin
- University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M Friend
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - S Frullani
- INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - E Fuchey
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - F Garibaldi
- INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - D Gaskell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - O Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
| | - C Gu
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - P Gueye
- Hampton University, Hampton, Virginia 23668, USA
| | - D Hamilton
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - C Hanretty
- Florida State University, Tallahassee, Florida 32306, USA
| | - J-O Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - T Holmstrom
- Longwood University, Farmville, Virginia 23909, USA
| | - M Huang
- Duke University, Durham, North Carolina 27708, USA
| | - S Iqbal
- California State University, Los Angeles, Los Angeles, California 90032, USA
| | - G Jin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | | | - H Kang
- Seoul National University, Seoul, Korea
| | - M Khandaker
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Leckey
- Indiana University, Bloomington, Indiana 47405, USA
| | - R Lindgren
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Long
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - J Mammei
- Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - D J Margaziotis
- California State University, Los Angeles, Los Angeles, California 90032, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | | | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z Meziani
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - P Monaghan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Hampton University, Hampton, Virginia 23668, USA
| | | | - B Norum
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - K Pan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Phillips
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - I Pomerantz
- Tel Aviv University, Tel Aviv 69978, Israel and The University of Texas at Austin, Austin, Texas 78712, USA
| | - M Posik
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - X Qian
- Duke University, Durham, North Carolina 27708, USA
| | - Y Qiang
- Duke University, Durham, North Carolina 27708, USA
| | - X Qiu
- Lanzhou University, Lanzhou, China
| | - A Rakhman
- Syracuse University, Syracuse, New York 13244, USA
| | - P E Reimer
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Riordan
- University of Virginia, Charlottesville, Virginia 22904, USA and University of Massachusetts, Amherst, Massachusetts 01006, USA
| | - G Ron
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel
| | - O Rondon-Aramayo
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Schulte
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - L Selvy
- Kent State University, Kent, Ohio 44242, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - S Sirca
- University of Ljubljana, Ljubljana, Slovenia
| | - J Sjoegren
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - K Slifer
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - P Solvignon
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Sparveris
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R Subedi
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Tireman
- Northern Michigan University, Marquette, Michigan 49855, USA
| | - D Wang
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L B Weinstein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - W Yan
- University of Science and Technology, Hefei, China
| | - I Yaron
- Tel Aviv University, Tel Aviv 69978, Israel
| | - Z Ye
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Zhan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Zhang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Y Zhang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - B Zhao
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - Z Zhao
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Zhu
- University of Science and Technology, Hefei, China
| | - R Zielinski
- University of New Hampshire, Durham, New Hampshire 03824, USA
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10
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Abrahamyan S, Ahmed Z, Albataineh H, Aniol K, Armstrong DS, Armstrong W, Averett T, Babineau B, Barbieri A, Bellini V, Beminiwattha R, Benesch J, Benmokhtar F, Bielarski T, Boeglin W, Camsonne A, Canan M, Carter P, Cates GD, Chen C, Chen JP, Hen O, Cusanno F, Dalton MM, De Leo R, de Jager K, Deconinck W, Decowski P, Deng X, Deur A, Dutta D, Etile A, Flay D, Franklin GB, Friend M, Frullani S, Fuchey E, Garibaldi F, Gasser E, Gilman R, Giusa A, Glamazdin A, Gomez J, Grames J, Gu C, Hansen O, Hansknecht J, Higinbotham DW, Holmes RS, Holmstrom T, Horowitz CJ, Hoskins J, Huang J, Hyde CE, Itard F, Jen CM, Jensen E, Jin G, Johnston S, Kelleher A, Kliakhandler K, King PM, Kowalski S, Kumar KS, Leacock J, Leckey J, Lee JH, LeRose JJ, Lindgren R, Liyanage N, Lubinsky N, Mammei J, Mammoliti F, Margaziotis DJ, Markowitz P, McCreary A, McNulty D, Mercado L, Meziani ZE, Michaels RW, Mihovilovic M, Muangma N, Muñoz-Camacho C, Nanda S, Nelyubin V, Nuruzzaman N, Oh Y, Palmer A, Parno D, Paschke KD, Phillips SK, Poelker B, Pomatsalyuk R, Posik M, Puckett AJR, Quinn B, Rakhman A, Reimer PE, Riordan S, Rogan P, Ron G, Russo G, Saenboonruang K, Saha A, Sawatzky B, Shahinyan A, Silwal R, Sirca S, Slifer K, Solvignon P, Souder PA, Sperduto ML, Subedi R, Suleiman R, Sulkosky V, Sutera CM, Tobias WA, Troth W, Urciuoli GM, Waidyawansa B, Wang D, Wexler J, Wilson R, Wojtsekhowski B, Yan X, Yao H, Ye Y, Ye Z, Yim V, Zana L, Zhan X, Zhang J, Zhang Y, Zheng X, Zhu P. Measurement of the neutron radius of 208Pb through parity violation in electron scattering. Phys Rev Lett 2012; 108:112502. [PMID: 22540469 DOI: 10.1103/physrevlett.108.112502] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Indexed: 05/31/2023]
Abstract
We report the first measurement of the parity-violating asymmetry A(PV) in the elastic scattering of polarized electrons from 208Pb. A(PV) is sensitive to the radius of the neutron distribution (R(n)). The result A(PV)=0.656±0.060(stat)±0.014(syst) ppm corresponds to a difference between the radii of the neutron and proton distributions R(n)-R(p)=0.33(-0.18)(+0.16) fm and provides the first electroweak observation of the neutron skin which is expected in a heavy, neutron-rich nucleus.
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11
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Fomin N, Arrington J, Asaturyan R, Benmokhtar F, Boeglin W, Bosted P, Bruell A, Bukhari MHS, Christy ME, Chudakov E, Clasie B, Connell SH, Dalton MM, Daniel A, Day DB, Dutta D, Ent R, El Fassi L, Fenker H, Filippone BW, Garrow K, Gaskell D, Hill C, Holt RJ, Horn T, Jones MK, Jourdan J, Kalantarians N, Keppel CE, Kiselev D, Kotulla M, Lindgren R, Lung AF, Malace S, Markowitz P, McKee P, Meekins DG, Mkrtchyan H, Navasardyan T, Niculescu G, Opper AK, Perdrisat C, Potterveld DH, Punjabi V, Qian X, Reimer PE, Roche J, Rodriguez VM, Rondon O, Schulte E, Seely J, Segbefia E, Slifer K, Smith GR, Solvignon P, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Tvaskis V, Vulcan WF, Wasko C, Wesselmann FR, Wood SA, Wright J, Zheng X. New measurements of high-momentum nucleons and short-range structures in nuclei. Phys Rev Lett 2012; 108:092502. [PMID: 22463628 DOI: 10.1103/physrevlett.108.092502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Indexed: 05/31/2023]
Abstract
We present new measurements of electron scattering from high-momentum nucleons in nuclei. These data allow an improved determination of the strength of two-nucleon correlations for several nuclei, including light nuclei where clustering effects can, for the first time, be examined. The data also include the kinematic region where three-nucleon correlations are expected to dominate.
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Affiliation(s)
- N Fomin
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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12
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Boeglin WU, Coman L, Ambrozewicz P, Aniol K, Arrington J, Batigne G, Bosted P, Camsonne A, Chang G, Chen JP, Choi S, Deur A, Epstein M, Finn JM, Frullani S, Furget C, Garibaldi F, Gayou O, Gilman R, Hansen O, Hayes D, Higinbotham DW, Hinton W, Hyde C, Ibrahim H, de Jager CW, Jiang X, Jones MK, Kaufman LJ, Klein A, Kox S, Kramer L, Kumbartzki G, Laget JM, LeRose J, Lindgren R, Margaziotis DJ, Markowitz P, McCormick K, Meziani Z, Michaels R, Milbrath B, Mitchell J, Monaghan P, Moteabbed M, Moussiegt P, Nasseripour R, Paschke K, Perdrisat C, Piasetzky E, Punjabi V, Qattan IA, Quéméner G, Ransome RD, Raue B, Réal JS, Reinhold J, Reitz B, Roché R, Roedelbronn M, Saha A, Slifer K, Solvignon P, Sulkosky V, Ulmer PE, Voutier E, Weinstein LB, Wojtsekhowski B, Zeier M. Probing the high momentum component of the deuteron at high Q2. Phys Rev Lett 2011; 107:262501. [PMID: 22243152 DOI: 10.1103/physrevlett.107.262501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Indexed: 05/31/2023]
Abstract
The (2)H(e,e'p)n cross section at a momentum transfer of 3.5 (GeV/c)(2) was measured over a kinematical range that made it possible to study this reaction for a set of fixed missing momenta as a function of the neutron recoil angle θ(nq) and to extract missing momentum distributions for fixed values of θ(nq) up to 0.55 GeV/c. In the region of 35°≤θ(nq)≤45° recent calculations, which predict that final-state interactions are small, agree reasonably well with the experimental data. Therefore, these experimental reduced cross sections provide direct access to the high momentum component of the deuteron momentum distribution in exclusive deuteron electrodisintegration.
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Affiliation(s)
- W U Boeglin
- Florida International University, University Park, Florida 33199, USA
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13
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Fomin N, Arrington J, Day DB, Gaskell D, Daniel A, Seely J, Asaturyan R, Benmokhtar F, Boeglin W, Boillat B, Bosted P, Bruell A, Bukhari MHS, Christy ME, Chudakov E, Clasie B, Connell SH, Dalton MM, Dutta D, Ent R, El Fassi L, Fenker H, Filippone BW, Garrow K, Hill C, Holt RJ, Horn T, Jones MK, Jourdan J, Kalantarians N, Keppel CE, Kiselev D, Kotulla M, Lindgren R, Lung AF, Malace S, Markowitz P, McKee P, Meekins DG, Miyoshi T, Mkrtchyan H, Navasardyan T, Niculescu G, Okayasu Y, Opper AK, Perdrisat C, Potterveld DH, Punjabi V, Qian X, Reimer PE, Roche J, Rodriguez VM, Rondon O, Schulte E, Segbefia E, Slifer K, Smith GR, Solvignon P, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Tvaskis V, Vulcan WF, Wasko C, Wesselmann FR, Wood SA, Wright J, Zheng X. Scaling of the F2 structure function in nuclei and quark distributions at x>1. Phys Rev Lett 2010; 105:212502. [PMID: 21231294 DOI: 10.1103/physrevlett.105.212502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Indexed: 05/30/2023]
Abstract
We present new data on electron scattering from a range of nuclei taken in Hall C at Jefferson Lab. For heavy nuclei, we observe a rapid falloff in the cross section for x>1, which is sensitive to short-range contributions to the nuclear wave function, and in deep inelastic scattering corresponds to probing extremely high momentum quarks. This result agrees with higher energy muon scattering measurements, but is in sharp contrast to neutrino scattering measurements which suggested a dramatic enhancement in the distribution of the "superfast" quarks probed at x>1. The falloff at x>1 is noticeably stronger in 2H and 3He, but nearly identical for all heavier nuclei.
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Affiliation(s)
- N Fomin
- University of Virginia, Charlottesville, Virginia, USA
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14
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Slifer K, Rondón OA, Aghalaryan A, Ahmidouch A, Asaturyan R, Bloch F, Boeglin W, Bosted P, Carasco C, Carlini R, Cha J, Chen JP, Christy ME, Cole L, Coman L, Crabb D, Danagoulian S, Day D, Dunne J, Elaasar M, Ent R, Fenker H, Frlez E, Gaskell D, Gan L, Gomez J, Hu B, Jourdan J, Jones MK, Keith C, Keppel CE, Khandaker M, Klein A, Kramer L, Liang Y, Lichtenstadt J, Lindgren R, Mack D, McKee P, McNulty D, Meekins D, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Pocanic D, Prok Y, Raue B, Reinhold J, Roche J, Kiselev D, Savvinov N, Sawatzky B, Seely M, Sick I, Smith C, Smith G, Stepanyan S, Tang L, Tajima S, Testa G, Vulcan W, Wang K, Warren G, Wesselmann FR, Wood S, Yan C, Yuan L, Yun J, Zeier M, Zhu H. Probing quark-gluon interactions with transverse polarized scattering. Phys Rev Lett 2010; 105:101601. [PMID: 20867509 DOI: 10.1103/physrevlett.105.101601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2009] [Revised: 08/24/2010] [Indexed: 05/29/2023]
Abstract
We have extracted QCD matrix elements from our data on doubly polarized inelastic scattering of electrons on nuclei. We find the higher twist matrix element d˜2, which arises strictly from quark-gluon interactions, to be unambiguously nonzero. The data also reveal an isospin dependence of higher twist effects if we assume that the Burkhardt-Cottingham sum rule is valid. The fundamental Bjorken sum rule obtained from the a0 matrix element is satisfied at our low momentum transfer.
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Affiliation(s)
- K Slifer
- University of Virginia, Charlottesville, Virginia 22903, USA
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15
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Seely J, Daniel A, Gaskell D, Arrington J, Fomin N, Solvignon P, Asaturyan R, Benmokhtar F, Boeglin W, Boillat B, Bosted P, Bruell A, Bukhari MHS, Christy ME, Clasie B, Connell S, Dalton MM, Day D, Dunne J, Dutta D, El Fassi L, Ent R, Fenker H, Filippone BW, Gao H, Hill C, Holt RJ, Horn T, Hungerford E, Jones MK, Jourdan J, Kalantarians N, Keppel CE, Kiselev D, Kotulla M, Lee C, Lung AF, Malace S, Meekins DG, Mertens T, Mkrtchyan H, Navasardyan T, Niculescu G, Niculescu I, Nomura H, Okayasu Y, Opper AK, Perdrisat C, Potterveld DH, Punjabi V, Qian X, Reimer PE, Roche J, Rodriguez VM, Rondon O, Schulte E, Segbefia E, Slifer K, Smith GR, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Tvaskis V, Vulcan WF, Wesselmann FR, Wood SA, Wright J, Yuan L, Zheng X. New measurements of the European Muon Collaboration effect in very light nuclei. Phys Rev Lett 2009; 103:202301. [PMID: 20365978 DOI: 10.1103/physrevlett.103.202301] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 07/27/2009] [Indexed: 05/29/2023]
Abstract
New Jefferson Lab data are presented on the nuclear dependence of the inclusive cross section from (2)H, (3)He, (4)He, (9)Be and (12)C for 0.3 < x < 0.9, Q(2) approximately 3-6 GeV(2). These data represent the first measurement of the EMC effect for (3)He at large x and a significant improvement for (4)He. The data do not support previous A-dependent or density-dependent fits to the EMC effect and suggest that the nuclear dependence of the quark distributions may depend on the local nuclear environment.
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Affiliation(s)
- J Seely
- Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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16
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Solvignon P, Liyanage N, Chen JP, Choi S, Aniol K, Averett T, Boeglin W, Camsonne A, Cates GD, Chang CC, Chudakov E, Craver B, Cusanno F, Deur A, Dutta D, Ent R, Feuerbach R, Frullani S, Gao H, Garibaldi F, Gilman R, Glashausser C, Gorbenko V, Hansen O, Higinbotham DW, Ibrahim H, Jiang X, Jones M, Kelleher A, Kelly J, Keppel C, Kim W, Korsch W, Kramer K, Kumbartzki G, Lerose JJ, Lindgren R, Ma B, Margaziotis DJ, Markowitz P, McCormick K, Meziani ZE, Michaels R, Moffit B, Monaghan P, Munoz Camacho C, Paschke K, Reitz B, Saha A, Sheyor R, Singh J, Slifer K, Sulkosky V, Tobias A, Urciuoli GM, Wang K, Wijesooriya K, Wojtsekhowski B, Woo S, Yang JC, Zheng X, Zhu L. Quark-hadron duality in neutron (3He) spin structure. Phys Rev Lett 2008; 101:182502. [PMID: 18999823 DOI: 10.1103/physrevlett.101.182502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2008] [Indexed: 05/27/2023]
Abstract
We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g_{1} of the neutron and 3He using a polarized 3He target in the four-momentum-transfer-squared range from 0.7 to 4.0 (GeV/c);{2}. Global duality is observed for the spin-structure function g_{1} down to at least Q;{2}=1.8 (GeV/c);{2} in both targets. We have also formed the photon-nucleon asymmetry A1 in the resonance region for 3He and found no strong Q2 dependence above 2.2 (GeV/c);{2}.
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Affiliation(s)
- P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
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17
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Slifer K, Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi B, Black T, Brash E, Brown D, Burtin E, Calarco J, Cates G, Chai Z, Chen JP, Choi S, Chudakov E, Ciofi Degli Atti C, Cisbani E, de Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn M, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Glöckle W, Golak J, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman B, Holmes R, Huber GM, Hughes E, Humensky B, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones G, Jones M, Jutier C, Kamada H, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar K, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose JJ, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown RD, Meziani ZE, Michaels R, Mitchell J, Nogga A, Pace E, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatié F, Saha A, Salmè G, Scopetta S, Skibiński R, Souder P, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van der Meer R, Vernin P, Voskanian H, Witała H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zolnierczuk P. 3He spin-dependent cross sections and sum rules. Phys Rev Lett 2008; 101:022303. [PMID: 18764175 DOI: 10.1103/physrevlett.101.022303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Indexed: 05/26/2023]
Abstract
We present a measurement of the spin-dependent cross sections for the 3He over -->(e over -->,e')X reaction in the quasielastic and resonance regions at a four-momentum transfer 0.1< or =Q2< or =0.9 GeV2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt-Cottingham and extended Gerasimov-Drell-Hearn sum rules for the first time. The data are also compared to an impulse approximation calculation and an exact three-body Faddeev calculation in the quasielastic region.
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Affiliation(s)
- K Slifer
- Temple University, Philadelphia, Pennsylvania 19122, USA
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18
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Subedi R, Shneor R, Monaghan P, Anderson BD, Aniol K, Annand J, Arrington J, Benaoum H, Benmokhtar F, Boeglin W, Chen JP, Choi S, Cisbani E, Craver B, Frullani S, Garibaldi F, Gilad S, Gilman R, Glamazdin O, Hansen JO, Higinbotham DW, Holmstrom T, Ibrahim H, Igarashi R, de Jager CW, Jans E, Jiang X, Kaufman LJ, Kelleher A, Kolarkar A, Kumbartzki G, LeRose JJ, Lindgren R, Liyanage N, Margaziotis DJ, Markowitz P, Marrone S, Mazouz M, Meekins D, Michaels R, Moffit B, Perdrisat CF, Piasetzky E, Potokar M, Punjabi V, Qiang Y, Reinhold J, Ron G, Rosner G, Saha A, Sawatzky B, Shahinyan A, Sirca S, Slifer K, Solvignon P, Sulkosky V, Urciuoli GM, Voutier E, Watson JW, Weinstein LB, Wojtsekhowski B, Wood S, Zheng XC, Zhu L. Probing Cold Dense Nuclear Matter. Science 2008; 320:1476-8. [DOI: 10.1126/science.1156675] [Citation(s) in RCA: 310] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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19
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Mazouz M, Camsonne A, Camacho CM, Ferdi C, Gavalian G, Kuchina E, Amarian M, Aniol KA, Beaumel M, Benaoum H, Bertin P, Brossard M, Chen JP, Chudakov E, Craver B, Cusanno F, de Jager CW, Deur A, Feuerbach R, Fieschi JM, Frullani S, Garçon M, Garibaldi F, Gayou O, Gilman R, Gomez J, Gueye P, Guichon PAM, Guillon B, Hansen O, Hayes D, Higinbotham D, Holmstrom T, Hyde CE, Ibrahim H, Igarashi R, Jiang X, Jo HS, Kaufman LJ, Kelleher A, Kolarkar A, Kumbartzki G, Laveissiere G, Lerose JJ, Lindgren R, Liyanage N, Lu HJ, Margaziotis DJ, Meziani ZE, McCormick K, Michaels R, Michel B, Moffit B, Monaghan P, Nanda S, Nelyubin V, Potokar M, Qiang Y, Ransome RD, Réal JS, Reitz B, Roblin Y, Roche J, Sabatié F, Saha A, Sirca S, Slifer K, Solvignon P, Subedi R, Sulkosky V, Ulmer PE, Voutier E, Wang K, Weinstein LB, Wojtsekhowski B, Zheng X, Zhu L. Deeply virtual compton scattering off the neutron. Phys Rev Lett 2007; 99:242501. [PMID: 18233443 DOI: 10.1103/physrevlett.99.242501] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2007] [Indexed: 05/25/2023]
Abstract
The present experiment exploits the interference between the deeply virtual Compton scattering (DVCS) and the Bethe-Heitler processes to extract the imaginary part of DVCS amplitudes on the neutron and on the deuteron from the helicity-dependent D(e,e'gamma)X cross section measured at Q2=1.9 GeV2 and xB=0.36. We extract a linear combination of generalized parton distributions (GPDs) particularly sensitive to E_{q}, the least constrained GPD. A model dependent constraint on the contribution of the up and down quarks to the nucleon spin is deduced.
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Affiliation(s)
- M Mazouz
- LPSC, Université Joseph Fourier, CNRS/IN2P3, INPG, F-38026 Grenoble, France
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Ron G, Glister J, Lee B, Allada K, Armstrong W, Arrington J, Beck A, Benmokhtar F, Berman BL, Boeglin W, Brash E, Camsonne A, Calarco J, Chen JP, Choi S, Chudakov E, Coman L, Craver B, Cusanno F, Dumas J, Dutta C, Feuerbach R, Freyberger A, Frullani S, Garibaldi F, Gilman R, Hansen O, Higinbotham DW, Holmstrom T, Hyde CE, Ibrahim H, Ilieva Y, de Jager CW, Jiang X, Jones MK, Kang H, Kelleher A, Khrosinkova E, Kuchina E, Kumbartzki G, LeRose JJ, Lindgren R, Markowitz P, May-Tal Beck S, McCullough E, Meekins D, Meziane M, Meziani ZE, Michaels R, Moffit B, Norum BE, Oh Y, Olson M, Paolone M, Paschke K, Perdrisat CF, Piasetzky E, Potokar M, Pomatsalyuk R, Pomerantz I, Puckett A, Punjabi V, Qian X, Qiang Y, Ransome R, Reyhan M, Roche J, Rousseau Y, Saha A, Sarty AJ, Sawatzky B, Schulte E, Shabestari M, Shahinyan A, Shneor R, Sirca S, Slifer K, Solvignon P, Song J, Sparks R, Subedi R, Strauch S, Urciuoli GM, Wang K, Wojtsekhowski B, Yan X, Yao H, Zhan X, Zhu X. Measurements of the proton elastic-form-factor ratio mu pG p E/G p M at low momentum transfer. Phys Rev Lett 2007; 99:202002. [PMID: 18233135 DOI: 10.1103/physrevlett.99.202002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2007] [Indexed: 05/25/2023]
Abstract
High-precision measurements of the proton elastic form-factor ratio, mu pG p E/G p M, have been made at four-momentum transfer, Q2, values between 0.2 and 0.5 GeV2. The new data, while consistent with previous results, clearly show a ratio less than unity and significant differences from the central values of several recent phenomenological fits. By combining the new form-factor ratio data with an existing cross-section measurement, one finds that in this Q2 range the deviation from unity is primarily due to G p E being smaller than expected.
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Affiliation(s)
- G Ron
- Tel Aviv University, Tel Aviv 69978, Israel
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21
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Shneor R, Monaghan P, Subedi R, Anderson BD, Aniol K, Annand J, Arrington J, Benaoum H, Benmokhtar F, Bertin P, Bertozzi W, Boeglin W, Chen JP, Choi S, Chudakov E, Cisbani E, Craver B, de Jager CW, Feuerbach RJ, Frullani S, Garibaldi F, Gayou O, Gilad S, Gilman R, Glamazdin O, Gomez J, Hansen JO, Higinbotham DW, Holmstrom T, Ibrahim H, Igarashi R, Jans E, Jiang X, Jiang Y, Kaufman L, Kelleher A, Kolarkar A, Kuchina E, Kumbartzki G, LeRose JJ, Lindgren R, Liyanage N, Margaziotis DJ, Markowitz P, Marrone S, Mazouz M, Meekins D, Michaels R, Moffit B, Nanda S, Perdrisat CF, Piasetzky E, Potokar M, Punjabi V, Qiang Y, Reinhold J, Reitz B, Ron G, Rosner G, Saha A, Sawatzky B, Shahinyan A, Sirca S, Slifer K, Solvignon P, Sulkosky V, Thompson N, Ulmer PE, Urciuoli GM, Voutier E, Wang K, Watson JW, Weinstein LB, Wojtsekhowski B, Wood S, Yao H, Zheng X, Zhu L. Investigation of proton-proton short-range correlations via the 12C(e,e'pp) reaction. Phys Rev Lett 2007; 99:072501. [PMID: 17930888 DOI: 10.1103/physrevlett.99.072501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2007] [Indexed: 05/25/2023]
Abstract
We investigated simultaneously the 12C(e,e'p) and 12C(e,e'pp) reactions at Q2=2 (GeV/c)2, xB=1.2, and in an (e, e'p) missing-momentum range from 300 to 600 MeV/c. At these kinematics, with a missing momentum greater than the Fermi momentum of nucleons in a nucleus and far from the delta excitation, short-range nucleon-nucleon correlations are predicted to dominate the reaction. For (9.5+/-2)% of the 12C(e,e'p) events, a recoiling partner proton was observed back-to-back to the 12C(e,e'p) missing-momentum vector, an experimental signature of correlations.
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Affiliation(s)
- R Shneor
- Tel Aviv University, Tel Aviv 69978, Israel
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22
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Jiang X, Arrington J, Benmokhtar F, Camsonne A, Chen JP, Choi S, Chudakov E, Cusanno F, Deur A, Dutta D, Garibaldi F, Gaskell D, Gayou O, Gilman R, Glashauser C, Hamilton D, Hansen O, Higinbotham DW, Holt RJ, de Jager CW, Jones MK, Kaufman LJ, Kinney ER, Kramer K, Lagamba L, de Leo R, Lerose J, Lhuillier D, Lindgren R, Liyanage N, McCormick K, Meziani ZE, Michaels R, Moffit B, Monaghan P, Nanda S, Paschke KD, Perdrisat CF, Punjabi V, Qattan IA, Ransome RD, Reimer PE, Reitz B, Saha A, Schulte EC, Sheyor R, Slifer K, Solvignon P, Sulkosky V, Urciuoli GM, Voutier E, Wang K, Wijesooriya K, Wojtsekhowski B, Zhu L. Recoil-proton polarization in high-energy deuteron photodisintegration with circularly polarized photons. Phys Rev Lett 2007; 98:182302. [PMID: 17501566 DOI: 10.1103/physrevlett.98.182302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Indexed: 05/15/2023]
Abstract
We measured the angular dependence of the three recoil-proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily. Transverse polarizations are not well described, but suggest isovector dominance.
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Affiliation(s)
- X Jiang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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23
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Danagoulian A, Mamyan VH, Roedelbronn M, Aniol KA, Annand JRM, Bertin PY, Bimbot L, Bosted P, Calarco JR, Camsonne A, Chang CC, Chang TH, Chen JP, Choi S, Chudakov E, Degtyarenko P, de Jager CW, Deur A, Dutta D, Egiyan K, Gao H, Garibaldi F, Gayou O, Gilman R, Glamazdin A, Glashausser C, Gomez J, Hamilton DJ, Hansen JO, Hayes D, Higinbotham DW, Hinton W, Horn T, Howell C, Hunyady T, Hyde CE, Jiang X, Jones MK, Khandaker M, Ketikyan A, Kubarovsky V, Kramer K, Kumbartzki G, Laveissière G, Lerose J, Lindgren RA, Margaziotis DJ, Markowitz P, McCormick K, Meekins DG, Meziani ZE, Michaels R, Moussiegt P, Nanda S, Nathan AM, Nikolenko DM, Nelyubin V, Norum BE, Paschke K, Pentchev L, Perdrisat CF, Piasetzky E, Pomatsalyuk R, Punjabi VA, Rachek I, Radyushkin A, Reitz B, Roche R, Ron G, Sabatié F, Saha A, Savvinov N, Shahinyan A, Shestakov Y, Sirca S, Slifer K, Solvignon P, Stoler P, Tajima S, Sulkosky V, Todor L, Vlahovic B, Weinstein LB, Wang K, Wojtsekhowski B, Voskanyan H, Xiang H, Zheng X, Zhu L. Compton-scattering cross section on the proton at high momentum transfer. Phys Rev Lett 2007; 98:152001. [PMID: 17501338 DOI: 10.1103/physrevlett.98.152001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2007] [Indexed: 05/15/2023]
Abstract
Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s=5-11 and -t=2-7 GeV2 with a statistical accuracy of a few percent. The scaling power for the s dependence of the cross section at fixed center-of-mass angle was found to be 8.0+/-0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark.
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Affiliation(s)
- A Danagoulian
- University of Illinois, Urbana-Champaign, Illinois 61801, USA
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24
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Wesselmann FR, Slifer K, Tajima S, Aghalaryan A, Ahmidouch A, Asaturyan R, Bloch F, Boeglin W, Bosted P, Carasco C, Carlini R, Cha J, Chen JP, Christy ME, Cole L, Coman L, Crabb D, Danagoulian S, Day D, Dunne J, Elaasar M, Ent R, Fenker H, Frlez E, Gan L, Gaskell D, Gomez J, Hu B, Jones MK, Jourdan J, Keith C, Keppel CE, Khandaker M, Klein A, Kramer L, Liang Y, Lichtenstadt J, Lindgren R, Mack D, McKee P, McNulty D, Meekins D, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Pocanic D, Prok Y, Raue B, Reinhold J, Roche J, Rohe D, Rondón OA, Savvinov N, Sawatzky B, Seely M, Sick I, Smith C, Smith G, Stepanyan S, Tang L, Testa G, Vulcan W, Wang K, Warren G, Wood S, Yan C, Yuan L, Yun J, Zeier M, Zhu H. Proton spin structure in the resonance region. Phys Rev Lett 2007; 98:132003. [PMID: 17501192 DOI: 10.1103/physrevlett.98.132003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2006] [Indexed: 05/15/2023]
Abstract
We have examined the spin structure of the proton in the region of the nucleon resonances (1.085 GeV<W<1.910 GeV) at an average four momentum transfer of Q2=1.3 GeV2. Using the Jefferson Lab polarized electron beam, a spectrometer, and a polarized solid target, we measured the asymmetries A|| and A(perpendicular) to high precision, and extracted the asymmetries A1 and A2, and the spin structure functions g1 and g2. We found a notably nonzero A(perpendicular), significant contributions from higher-twist effects, and only weak support for polarized quark-hadron duality.
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25
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Acha A, Aniol KA, Armstrong DS, Arrington J, Averett T, Bailey SL, Barber J, Beck A, Benaoum H, Benesch J, Bertin PY, Bosted P, Butaru F, Burtin E, Cates GD, Chao YC, Chen JP, Chudakov E, Cisbani E, Craver B, Cusanno F, De Leo R, Decowski P, Deur A, Feuerbach RJ, Finn JM, Frullani S, Fuchs SA, Fuoti K, Gilman R, Glesener LE, Grimm K, Grames JM, Hansen JO, Hansknecht J, Higinbotham DW, Holmes R, Holmstrom T, Ibrahim H, de Jager CW, Jiang X, Katich J, Kaufman LJ, Kelleher A, King PM, Kolarkar A, Kowalski S, Kuchina E, Kumar KS, Lagamba L, LaViolette P, LeRose J, Lindgren RA, Lhuillier D, Liyanage N, Margaziotis DJ, Markowitz P, Meekins DG, Meziani ZE, Michaels R, Moffit B, Nanda S, Nelyubin V, Otis K, Paschke KD, Phillips SK, Poelker M, Pomatsalyuk R, Potokar M, Prok Y, Puckett A, Qian X, Qiang Y, Reitz B, Roche J, Saha A, Sawatzky B, Singh J, Slifer K, Sirca S, Snyder R, Solvignon P, Souder PA, Stutzman ML, Subedi R, Suleiman R, Sulkosky V, Tobias WA, Ulmer PE, Urciuoli GM, Wang K, Whitbeck A, Wilson R, Wojtsekhowski B, Yao H, Ye Y, Zhan X, Zheng X, Zhou S, Ziskin V. Precision measurements of the nucleon strange form factors at Q2 approximately 0.1 GeV2. Phys Rev Lett 2007; 98:032301. [PMID: 17358678 DOI: 10.1103/physrevlett.98.032301] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2006] [Indexed: 05/14/2023]
Abstract
We report new measurements of the parity-violating asymmetry A(PV) in elastic scattering of 3 GeV electrons off hydrogen and 4He targets with <theta(lab)> approximately 6.0 degrees . The 4He result is A(PV)=(+6.40+/-0.23(stat)+/-0.12(syst))x10(-6). The hydrogen result is A(PV)=(-1.58+/-0.12(stat)+/-0.04(syst))x10(-6). These results significantly improve constraints on the electric and magnetic strange form factors G(E)(s) and G(M)(s). We extract G(E)(s)=0.002+/-0.014+/-0.007 at <Q(2)>=0.077 GeV2, and G(E)(s)+0.09G(M)(s)=0.007+/-0.011+/-0.006 at <Q(2)>=0.109 GeV2, providing new limits on the role of strange quarks in the nucleon charge and magnetization distributions.
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Affiliation(s)
- A Acha
- Florida International University, Miami, Florida 33199, USA
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26
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Camacho CM, Camsonne A, Mazouz M, Ferdi C, Gavalian G, Kuchina E, Amarian M, Aniol KA, Beaumel M, Benaoum H, Bertin P, Brossard M, Chen JP, Chudakov E, Craver B, Cusanno F, de Jager CW, Deur A, Feuerbach R, Fieschi JM, Frullani S, Garçon M, Garibaldi F, Gayou O, Gilman R, Gomez J, Gueye P, Guichon PAM, Guillon B, Hansen O, Hayes D, Higinbotham D, Holmstrom T, Hyde-Wright CE, Ibrahim H, Igarashi R, Jiang X, Jo HS, Kaufman LJ, Kelleher A, Kolarkar A, Kumbartzki G, Laveissière G, Lerose JJ, Lindgren R, Liyanage N, Lu HJ, Margaziotis DJ, Meziani ZE, McCormick K, Michaels R, Michel B, Moffit B, Monaghan P, Nanda S, Nelyubin V, Potokar M, Qiang Y, Ransome RD, Réal JS, Reitz B, Roblin Y, Roche J, Sabatié F, Saha A, Sirca S, Slifer K, Solvignon P, Subedi R, Sulkosky V, Ulmer PE, Voutier E, Wang K, Weinstein LB, Wojtsekhowski B, Zheng X, Zhu L. Scaling tests of the cross section for deeply virtual Compton scattering. Phys Rev Lett 2006; 97:262002. [PMID: 17280421 DOI: 10.1103/physrevlett.97.262002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Indexed: 05/13/2023]
Abstract
We present the first measurements of the e[over -->]p-->epgamma cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q(2) dependence (from 1.5 to 2.3 GeV(2)) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q(2). The helicity-independent cross section is also measured at Q(2)=2.3 GeV(2). We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation.
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27
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Kramer K, Armstrong DS, Averett TD, Bertozzi W, Binet S, Butuceanu C, Camsonne A, Cates GD, Chen JP, Choi S, Chudakov E, Cusanno F, Deur A, Djawotho P, Dutta D, Finn JM, Gao H, Garibaldi F, Gayou O, Gilman R, Glamazdin A, Gorbenko V, Griffioen KA, Hansen JO, Higinbotham DW, Hinton W, Horn T, de Jager CW, Jiang X, Korsch W, LeRose J, Lhuillier D, Liyanage N, Margaziotis DJ, McCormick K, Meziani ZE, Michaels R, Milbrath B, Moffit B, Nanda S, Perdrisat CF, Pomatsalyuk R, Punjabi V, Reitz B, Roche J, Roché R, Roedelbronn M, Savvinov N, Secrest J, Singh J, Sirca S, Slifer K, Solvignon P, Steiner DJ, Suleiman R, Sulkosky V, Tobias A, Vacheret A, Xiao Y, Zheng X, Zhou J, Zhu L, Zhu X, Zołnierczuk PA. Q2 dependence of the neutron spin structure function g2(n) at low Q2. Phys Rev Lett 2005; 95:142002. [PMID: 16241646 DOI: 10.1103/physrevlett.95.142002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2005] [Indexed: 05/05/2023]
Abstract
We present the first measurement of the Q2 dependence of the neutron spin structure function g2(n) at five kinematic points covering 0.57 (GeV/c)2 < or = Q2 < or = 1.34 (GeV/c)2 at x approximately = 0.2. Though the naive quark-parton model predicts g2 = 0, nonzero values occur in more realistic models of the nucleon which include quark-gluon correlations, finite quark masses, or orbital angular momentum. When scattering from a noninteracting quark, g2(n) can be predicted using next-to-leading order fits to world data for g1(n). Deviations from this prediction provide an opportunity to examine QCD dynamics in nucleon structure. Our results show a positive deviation from this prediction at lower Q2, indicating that contributions such as quark-gluon interactions may be important. Precision data obtained for g1(n) are consistent with next-to-leading order fits to world data.
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Affiliation(s)
- K Kramer
- College of William and Mary, Williamsburg, Virginia 23187, USA
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28
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Qattan IA, Arrington J, Segel RE, Zheng X, Aniol K, Baker OK, Beams R, Brash EJ, Calarco J, Camsonne A, Chen JP, Christy ME, Dutta D, Ent R, Frullani S, Gaskell D, Gayou O, Gilman R, Glashausser C, Hafidi K, Hansen JO, Higinbotham DW, Hinton W, Holt RJ, Huber GM, Ibrahim H, Jisonna L, Jones MK, Keppel CE, Kinney E, Kumbartzki GJ, Lung A, Margaziotis DJ, McCormick K, Meekins D, Michaels R, Monaghan P, Moussiegt P, Pentchev L, Perdrisat C, Punjabi V, Ransome R, Reinhold J, Reitz B, Saha A, Sarty A, Schulte EC, Slifer K, Solvignon P, Sulkosky V, Wijesooriya K, Zeidman B. Precision Rosenbluth measurement of the proton elastic form factors. Phys Rev Lett 2005; 94:142301. [PMID: 15904058 DOI: 10.1103/physrevlett.94.142301] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2004] [Indexed: 05/02/2023]
Abstract
We report the results of a new Rosenbluth measurement of the proton electromagnetic form factors at Q2 values of 2.64, 3.20, and 4.10 GeV2. Cross sections were determined by detecting the recoiling proton, in contrast to previous measurements which detected the scattered electron. Cross sections were determined to 3%, with relative uncertainties below 1%. The ratio mu(p)G(E)/G(M) was determined to 4%-8% and showed mu(p)G(E)/G(M) approximately 1. These results are consistent with, and much more precise than, previous Rosenbluth extractions. They are inconsistent with recent polarization transfer measurements of similar precision, implying a systematic difference between the techniques.
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Affiliation(s)
- I A Qattan
- Northwestern University, Evanston, Illinois 60208, USA
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29
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Deur A, Bosted P, Burkert V, Cates G, Chen JP, Choi S, Crabb D, de Jager CW, De Vita R, Dodge GE, Fatemi R, Forest TA, Garibaldi F, Gilman R, Hughes EW, Jiang X, Korsch W, Kuhn SE, Melnitchouk W, Meziani ZE, Minehart R, Skabelin AV, Slifer K, Taiuti M, Yun J. Experimental determination of the evolution of the Bjorken integral at low Q2. Phys Rev Lett 2004; 93:212001. [PMID: 15600997 DOI: 10.1103/physrevlett.93.212001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2004] [Indexed: 05/24/2023]
Abstract
We extract the Bjorken integral Gamma1(p-n) in the range 0.17 < Q2 < 1.10 GeV2 from inclusive scattering of polarized electrons by polarized protons, deuterons, and 3He, for the region in which the integral is dominated by nucleon resonances. These data bridge the domains of the hadronic and partonic descriptions of the nucleon. In combination with earlier measurements at higher Q2, we extract the nonsinglet twist-4 matrix element f2.
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Affiliation(s)
- A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
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30
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Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi W, Black T, Brash E, Brown D, Burtin E, Calarco J, Cates G, Chai Z, Chen JP, Choi S, Chudakov E, Cisbani E, de Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn JM, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman B, Holmes R, Huber GM, Hughes E, Humensky B, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones G, Jones M, Jutier C, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar K, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose J, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown R, Meziani ZE, Michaels R, Mitchell J, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatie F, Saha A, Slifer K, Souder P, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van der Meer R, Vernin P, Voskanian H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zołnierczuk PA. Measurement of the generalized forward spin polarizabilities of the neutron. Phys Rev Lett 2004; 93:152301. [PMID: 15524867 DOI: 10.1103/physrevlett.93.152301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2004] [Indexed: 05/24/2023]
Abstract
The generalized forward spin polarizabilities gamma(0) and delta(LT) of the neutron have been extracted for the first time in a Q2 range from 0.1 to 0.9 GeV2. Since gamma(0) is sensitive to nucleon resonances and delta(LT) is insensitive to the Delta resonance, it is expected that the pair of forward spin polarizabilities should provide benchmark tests of the current understanding of the chiral dynamics of QCD. The new results on delta(LT) show significant disagreement with chiral perturbation theory calculations, while the data for gamma(0) at low Q2 are in good agreement with a next-to-leading-order relativistic baryon chiral perturbation theory calculation. The data show good agreement with the phenomenological MAID model.
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Affiliation(s)
- M Amarian
- Yerevan Physics Institute, Yerevan 375036, Armenia
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Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi B, Black T, Brash E, Brown D, Burtin E, Calarco J, Cates G, Chai Z, Chen JP, Choi S, Chudakov E, Cisbani E, De Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn M, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman B, Holmes R, Huber GM, Hughes E, Humensky B, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones G, Jones M, Jutier C, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar K, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose J, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown R, Meziani ZE, Michaels R, Mitchell J, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatie F, Saha A, Slifer K, Souder P, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van Der Meer R, Vernin P, Voskanian H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zolnierczuk P. Q2 evolution of the neutron spin structure moments using a 3He target. Phys Rev Lett 2004; 92:022301. [PMID: 14753931 DOI: 10.1103/physrevlett.92.022301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2003] [Indexed: 05/24/2023]
Abstract
We have measured the spin structure functions g(1) and g(2) of 3He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to 5.058 GeV off a polarized 3He target at a 15.5 degrees scattering angle. Excitation energies covered the resonance and the onset of the deep inelastic regions. We have determined for the first time the Q2 evolution of Gamma(1)(Q2)= integral (1)(0)g(1)(x,Q2)dx, Gamma(2)(Q2)= integral (1)(0)g(2)(x,Q2)dx, and d(2)(Q2)= integral (1)(0)x(2)[2g(1)(x,Q2)+3g(2)(x,Q2)]dx for the neutron in the range 0.1< or =Q2< or =0.9 GeV2 with good precision. Gamma(1)(Q2) displays a smooth variation from high to low Q2. The Burkhardt-Cottingham sum rule holds within uncertainties and d(2) is nonzero over the measured range.
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Affiliation(s)
- M Amarian
- Yerevan Physics Institute, Yerevan 375036, Armenia
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Zheng X, Aniol K, Armstrong DS, Averett TD, Bertozzi W, Binet S, Burtin E, Busato E, Butuceanu C, Calarco J, Camsonne A, Cates GD, Chai Z, Chen JP, Choi S, Chudakov E, Cusanno F, Leo RD, Deur A, Dieterich S, Dutta D, Finn JM, Frullani S, Gao H, Gao J, Garibaldi F, Gilad S, Gilman R, Gomez J, Hansen JO, Higinbotham DW, Hinton W, Horn T, De Jager CW, Jiang X, Kaufman L, Kelly J, Korsch W, Kramer K, LeRose J, Lhuillier D, Liyanage N, Margaziotis DJ, Marie F, Markowitz P, McCormick K, Meziani ZE, Michaels R, Moffit B, Nanda S, Neyret D, Phillips SK, Powell A, Pussieux T, Reitz B, Roche J, Roche R, Roedelbronn M, Ron G, Rvachev M, Saha A, Savvinov N, Singh J, Sirca S, Slifer K, Solvignon P, Souder P, Steiner DJ, Strauch S, Sulkosky V, Tobias A, Urciuoli G, Vacheret A, Wojtsekhowski B, Xiang H, Xiao Y, Xiong F, Zhang B, Zhu L, Zhu X, Zołnierczuk PA. Precision measurement of the neutron spin asymmetryA(n)(1) and spin-flavor decomposition in the valence quark region. Phys Rev Lett 2004; 92:012004. [PMID: 14753984 DOI: 10.1103/physrevlett.92.012004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2003] [Indexed: 05/24/2023]
Abstract
We have measured the neutron spin asymmetry A(n)(1) with high precision at three kinematics in the deep inelastic region at x=0.33, 0.47, and 0.60, and Q(2)=2.7, 3.5, and 4.8 (GeV/c)(2), respectively. Our results unambiguously show, for the first time, that A(n)(1) crosses zero around x=0.47 and becomes significantly positive at x=0.60. Combined with the world proton data, polarized quark distributions were extracted. Our results, in general, agree with relativistic constituent quark models and with perturbative quantum chromodynamics (PQCD) analyses based on the earlier data. However they deviate from PQCD predictions based on hadron helicity conservation.
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Affiliation(s)
- X Zheng
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi W, Black T, Brash E, Brown D, Burtin E, Calarco JR, Cates GD, Chai Z, Chen JP, Choi S, Chudakov E, Cisbani E, De Jager CW, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn M, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Goldberg E, Gomez J, Gorbenko V, Hansen JO, Hersman FW, Holmes R, Huber GM, Hughes EW, Humensky TB, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones GM, Jones M, Jutier C, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar KS, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose J, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown R, Meziani ZE, Michaels R, Mitchell J, Papandreou Z, Pavlin T, Petratos GG, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatie F, Saha A, Slifer K, Souder PA, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van Der Meer R, Vernin P, Voskanian H, Wojtsekhowski B, Xiong F, Xu W, Yang JC, Zhang B, Zolnierczuk P. Q2 evolution of the generalized Gerasimov-Drell-Hearn integral for the neutron using a 3He target. Phys Rev Lett 2002; 89:242301. [PMID: 12484938 DOI: 10.1103/physrevlett.89.242301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2002] [Indexed: 05/24/2023]
Abstract
We present data on the inclusive scattering of polarized electrons from a polarized 3He target at energies from 0.862 to 5.06 GeV, obtained at a scattering angle of 15.5 degrees. Our data include measurements from the quasielastic peak, through the nucleon resonance region, and beyond, and were used to determine the virtual photon cross-section difference sigma(1/2)-sigma(3/2). We extract the extended Gerasimov-Drell-Hearn integral for the neutron in the range of four-momentum transfer squared Q2 of 0.1-0.9 GeV2.
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Affiliation(s)
- M Amarian
- Istituto Nazionale di Fiscica Nucleare, Sezione Sanità, 00161 Roma, Italy
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Xiong F, Dutta D, Xu W, Anderson B, Auberbach L, Averett T, Bertozzi W, Black T, Calarco J, Cardman L, Cates GD, Chai ZW, Chen JP, Choi S, Chudakov E, Churchwell S, Corrado GS, Crawford C, Dale D, Deur A, Djawotho P, Filippone BW, Finn JM, Gao H, Gilman R, Glamazdin AV, Glashausser C, Glöckle W, Golak J, Gomez J, Gorbenko VG, Hansen JO, Hersman FW, Higinbotham DW, Holmes R, Howell CR, Hughes E, Humensky B, Incerti S, de Jager CW, Jensen JS, Jiang X, Jones CE, Jones M, Kahl R, Kamada H, Kievsky A, Kominis I, Korsch W, Kramer K, Kumbartzki G, Kuss M, Lakuriqi E, Liang M, Liyanage N, LeRose J, Malov S, Margaziotis DJ, Martin JW, McCormick K, McKeown RD, McIlhany K, Meziani ZE, Michaels R, Miller GW, Pace E, Pavlin T, Petratos GG, Pomatsalyuk RI, Pripstein D, Prout D, Ransome RD, Roblin Y, Rvachev M, Saha A, Salmè G, Schnee M, Shin T, Slifer K, Souder PA, Strauch S, Suleiman R, Sutter M, Tipton B, Todor L, Viviani M, Vlahovic B, Watson J, Williamson CF, Witała H, Wojtsekhowski B, Yeh J, Zołnierczuk P. Precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e, e'). Phys Rev Lett 2001; 87:242501. [PMID: 11736498 DOI: 10.1103/physrevlett.87.242501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2001] [Indexed: 05/23/2023]
Abstract
We present the first precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e,e') at Q2 values of 0.1 and 0.2 (GeV/c)2. The agreement between the data and nonrelativistic Faddeev calculations which include both final-state interactions and meson-exchange current effects is very good at Q2 = 0.1 (GeV/c)2, while a small discrepancy at Q2 = 0.2 (GeV/c)2 is observed.
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Affiliation(s)
- F Xiong
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Xu W, Dutta D, Xiong F, Anderson B, Auberbach L, Averett T, Bertozzi W, Black T, Calarco J, Cardman L, Cates GD, Chai ZW, Chen JP, Choi S, Chudakov E, Churchwell S, Corrado GS, Crawford C, Dale D, Deur A, Djawotho P, Filippone BW, Finn JM, Gao H, Gilman R, Glamazdin AV, Glashausser C, Glöckle W, Golak J, Gomez J, Gorbenko VG, Hansen JO, Hersman FW, Higinbotham DW, Holmes R, Howell CR, Hughes E, Humensky B, Incerti S, de Jager CW, Jensen JS, Jiang X, Jones CE, Jones M, Kahl R, Kamada H, Kievsky A, Kominis I, Korsch W, Kramer K, Kumbartzki G, Kuss M, Lakuriqi E, Liang M, Liyanage N, LeRose J, Malov S, Margaziotis DJ, Martin JW, McCormick K, McKeown RD, McIlhany K, Meziani ZE, Michaels R, Miller GW, Pace E, Pavlin T, Petratos GG, Pomatsalyuk RI, Pripstein D, Prout D, Ransome RD, Roblin Y, Rvachev M, Saha A, Salmè G, Schnee M, Shin T, Slifer K, Souder PA, Strauch S, Suleiman R, Sutter M, Tipton B, Todor L, Viviani M, Vlahovic B, Watson J, Williamson CF, Witała H, Wojtsekhowski B, Yeh J, Zołnierczuk P. Transverse asymmetry AT' from the quasielastic 3He(e,e') process and the neutron magnetic form factor. Phys Rev Lett 2000; 85:2900-2904. [PMID: 11005963 DOI: 10.1103/physrevlett.85.2900] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2000] [Indexed: 05/23/2023]
Abstract
We have measured the transverse asymmetry A(T') in 3He(e,e(')) quasielastic scattering in Hall A at Jefferson Laboratory with high precision for Q2 values from 0.1 to 0.6 (GeV/c)(2). The neutron magnetic form factor G(n)(M) was extracted based on Faddeev calculations for Q2 = 0.1 and 0.2 (GeV/c)(2) with an experimental uncertainty of less than 2%.
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Affiliation(s)
- W Xu
- Massachusetts Institute of Technology, Cambridge, Massuchusetts 02139, USA
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Bloch JM, Baysal MA, Travis AB, Slifer K. Transparent nondiffracting polarization rotation regime: A synchrotron x-ray study. Phys Rev Lett 1995; 75:256-259. [PMID: 10059648 DOI: 10.1103/physrevlett.75.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Jacobs HE, Lynch M, Cornick J, Slifer K. Behavior management of aggressive sequela after Reye's syndrome. Arch Phys Med Rehabil 1986; 67:558-63. [PMID: 2874781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This study describes the use of behavior management procedures to reduce the occurrence of severe behavioral sequela in a 14-year-old, post-Reye's syndrome male. Prior to intervention the client exhibited severe self-injurious, hyperaggressive, and food refusal behaviors that precluded any opportunities for rehabilitation, placed him at severe medical risk, and made him a candidate for institutional placement. With contingent restraint, in vivo desensitization, and reinforcement contingencies it was possible to control these behaviors and begin intensive rehabilitation. Subsequently, the client returned to his family and community day school for the severely handicapped where he remains five years later.
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