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DeGrush A, Maschinot A, Akdogan T, Alarcon R, Bertozzi W, Booth E, Botto T, Calarco JR, Clasie B, Crawford C, Dow K, Farkhondeh M, Fatemi R, Filoti O, Franklin W, Gao H, Geis E, Gilad S, Hasell DK, Karpius P, Kohl M, Kolster H, Lee T, Matthews J, McIlhany K, Meitanis N, Milner R, Rapaport J, Redwine R, Seely J, Shinozaki A, Sindile A, Širca S, Six E, Smith T, Tonguc B, Tschalär C, Tsentalovich E, Turchinetz W, Xiao Y, Xu W, Zhou ZL, Ziskin V, Zwart T. Measurement of the Vector and Tensor Asymmetries at Large Missing Momentum in Quasielastic (e[over →],e^{'}p) Electron Scattering from Deuterium. Phys Rev Lett 2017; 119:182501. [PMID: 29219591 DOI: 10.1103/physrevlett.119.182501] [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: 07/10/2017] [Indexed: 06/07/2023]
Abstract
We report the measurement of the beam-vector and tensor asymmetries A_{ed}^{V} and A_{d}^{T} in quasielastic (e[over →],e^{'}p) electrodisintegration of the deuteron at the MIT-Bates Linear Accelerator Center up to missing momentum of 500 MeV/c. Data were collected simultaneously over a momentum transfer range 0.1<Q^{2}<0.5 (GeV/c)^{2} with the Bates Large Acceptance Spectrometer Toroid using an internal deuterium gas target polarized sequentially in both vector and tensor states. The data are compared with calculations. The beam-vector asymmetry A_{ed}^{V} is found to be directly sensitive to the D-wave component of the deuteron and has a zero crossing at a missing momentum of about 320 MeV/c, as predicted. The tensor asymmetry A_{d}^{T} at large missing momentum is found to be dominated by the influence of the tensor force in the neutron-proton final-state interaction. The new data provide a strong constraint on theoretical models.
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Affiliation(s)
- A DeGrush
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Maschinot
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Akdogan
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Alarcon
- Arizona State University, Tempe, Arizona 85287, USA
| | - W Bertozzi
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - E Booth
- Boston University, Boston, Massachusetts 02215, USA
| | - T Botto
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J R Calarco
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - B Clasie
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - C Crawford
- University of Kentucky, Lexington, Kentucky 40504, USA
| | - K Dow
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Farkhondeh
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Fatemi
- University of Kentucky, Lexington, Kentucky 40504, USA
| | - O Filoti
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - W Franklin
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - H Gao
- Triangle Universities Nuclear Laboratory and Duke University, Durham, North Carolina 27708, USA
| | - E Geis
- Arizona State University, Tempe, Arizona 85287, USA
| | - S Gilad
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D K Hasell
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - P Karpius
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - M Kohl
- Hampton University, Hampton, Virginia 23668, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Kolster
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Lee
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - J Matthews
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - K McIlhany
- United States Naval Academy, Annapolis, Maryland 21402, USA
| | - N Meitanis
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Milner
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Rapaport
- Ohio University, Athens, Ohio 45701, USA
| | - R Redwine
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Seely
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Shinozaki
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Sindile
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - S Širca
- Faculty of Mathematics and Physics, University of Ljubljana, and Jožef Stefan Institute, 1000 Ljubljana, Slovenia
| | - E Six
- Arizona State University, Tempe, Arizona 85287, USA
| | - T Smith
- Dartmouth College, Hanover, New Hampshire 03755, USA
| | - B Tonguc
- Arizona State University, Tempe, Arizona 85287, USA
| | - C Tschalär
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - E Tsentalovich
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - W Turchinetz
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Y Xiao
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - W Xu
- Triangle Universities Nuclear Laboratory and Duke University, Durham, North Carolina 27708, USA
| | - Z-L Zhou
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Ziskin
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Zwart
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Zhang C, Kohl M, Akdogan T, Alarcon R, Bertozzi W, Booth E, Botto T, Calarco JR, Clasie B, Crawford C, DeGrush A, Dow K, Farkhondeh M, Fatemi R, Filoti O, Franklin W, Gao H, Geis E, Gilad S, Hasell D, Karpius P, Kolster H, Lee T, Maschinot A, Matthews J, McIlhany K, Meitanis N, Milner R, Rapaport J, Redwine R, Seely J, Shinozaki A, Sindile A, Širca S, Six E, Smith T, Tonguc B, Tschalär C, Tsentalovich E, Turchinetz W, Xiao Y, Xu W, Zhou ZL, Ziskin V, Zwart T. Precise measurement of deuteron tensor analyzing powers with BLAST. Phys Rev Lett 2011; 107:252501. [PMID: 22243068 DOI: 10.1103/physrevlett.107.252501] [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: 09/21/2011] [Indexed: 05/31/2023]
Abstract
We report a precision measurement of the deuteron tensor analyzing powers T(20) and T(21) at the MIT-Bates Linear Accelerator Center. Data were collected simultaneously over a momentum transfer range Q=2.15-4.50 fm(-1) with the Bates Large Acceptance Spectrometer Toroid using a highly polarized deuterium internal gas target. The data are in excellent agreement with calculations in a framework of effective field theory. The deuteron charge monopole and quadrupole form factors G(C) and G(Q) were separated with improved precision, and the location of the first node of G(C) was confirmed at Q=4.19±0.05 fm(-1). The new data provide a strong constraint on theoretical models in a momentum transfer range covering the minimum of T(20) and the first node of G(C).
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Affiliation(s)
- C Zhang
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Geis E, Kohl M, Ziskin V, Akdogan T, Arenhövel H, Alarcon R, Bertozzi W, Booth E, Botto T, Calarco J, Clasie B, Crawford CB, DeGrush A, Donnelly TW, Dow K, Farkhondeh M, Fatemi R, Filoti O, Franklin W, Gao H, Gilad S, Hasell D, Karpius P, Kolster H, Lee T, Maschinot A, Matthews J, McIlhany K, Meitanis N, Milner RG, Rapaport J, Redwine RP, Seely J, Shinozaki A, Sirca S, Sindile A, Six E, Smith T, Steadman M, Tonguc B, Tschalaer C, Tsentalovich E, Turchinetz W, Xiao Y, Xu W, Zhang C, Zhou Z, Zwart T. Charge form factor of the neutron at low momentum transfer from the 2H-->(e-->,e'n)1H reaction. Phys Rev Lett 2008; 101:042501. [PMID: 18764321 DOI: 10.1103/physrevlett.101.042501] [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: 03/26/2008] [Indexed: 05/26/2023]
Abstract
We report new measurements of the neutron charge form factor at low momentum transfer using quasielastic electrodisintegration of the deuteron. Longitudinally polarized electrons at an energy of 850 MeV were scattered from an isotopically pure, highly polarized deuterium gas target. The scattered electrons and coincident neutrons were measured by the Bates Large Acceptance Spectrometer Toroid (BLAST) detector. The neutron form factor ratio GEn/GMn was extracted from the beam-target vector asymmetry AedV at four-momentum transfers Q2=0.14, 0.20, 0.29, and 0.42 (GeV/c)2.
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Affiliation(s)
- E Geis
- Arizona State University, Tempe, Arizona 85287, USA
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Crawford CB, Sindile A, Akdogan T, Alarcon R, Bertozzi W, Booth E, Botto T, Calarco J, Clasie B, Degrush A, Donnelly TW, Dow K, Dutta D, Farkhondeh M, Fatemi R, Filoti O, Franklin W, Gao H, Geis E, Gilad S, Haeberli W, Hasell D, Hersman W, Holtrop M, Karpius P, Kohl M, Kolster H, Lee T, Maschinot A, Matthews J, McIlhany K, Meitanis N, Milner RG, Redwine RP, Seely J, Shinozaki A, Sirca S, Six E, Smith T, Tonguc B, Tschalaer C, Tsentalovich E, Turchinetz W, van den Brand JFJ, van der Laan J, Wang F, Wise T, Xiao Y, Xu W, Zhang C, Zhou Z, Ziskin V, Zwart T. -Measurement of the proton's electric to magnetic form factor ratio from 1H(over -->)(e(over -->),e'p). Phys Rev Lett 2007; 98:052301. [PMID: 17358849 DOI: 10.1103/physrevlett.98.052301] [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: 09/07/2006] [Indexed: 05/14/2023]
Abstract
We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was performed at the MIT-Bates South Hall Ring over a range of four-momentum transfer squared Q2 from 0.15 to 0.65 (GeV/c)(2). Significantly improved results on the proton electric and magnetic form factors are obtained in combination with existing cross-section data on elastic electron-proton scattering in the same Q2 region.
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Affiliation(s)
- C B Crawford
- Laboratory for Nuclear Science and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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