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Thiel A, Sokhoyan V, Gutz E, van Pee H, Anisovich AV, Bacelar JCS, Bantes B, Bartholomy O, Bayadilov D, Beck R, Beloglazov Y, Castelijns R, Crede V, Dutz H, Elsner D, Ewald R, Frommberger F, Fuchs M, Funke C, Gregor R, Gridnev A, Hillert W, Hoffmeister P, Horn I, Jaegle I, Junkersfeld J, Kalinowsky H, Kammer S, Kleber V, Klein F, Klein F, Klempt E, Kotulla M, Krusche B, Lang M, Löhner H, Lopatin I, Lugert S, Mertens T, Messchendorp JG, Metag V, Metsch B, Nanova M, Nikonov V, Novinski D, Novotny R, Ostrick M, Pant L, Pfeiffer M, Piontek D, Roy A, Sarantsev AV, Schmidt C, Schmieden H, Shende S, Süle A, Sumachev VV, Szczepanek T, Thoma U, Trnka D, Varma R, Walther D, Wendel C, Wilson A. Three-body nature of N(*) and Δ(*) resonances from sequential decay chains. Phys Rev Lett 2015; 114:091803. [PMID: 25793801 DOI: 10.1103/physrevlett.114.091803] [Citation(s) in RCA: 3] [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: 11/03/2014] [Indexed: 06/04/2023]
Abstract
The Nπ^{0}π^{0} decays of positive-parity N^{*} and Δ^{*} resonances at about 2 GeV are studied at ELSA by photoproduction of two neutral pions off protons. The data reveal clear evidence for several intermediate resonances: Δ(1232), N(1520)3/2^{-}, and N(1680)5/2^{+}, with spin parities J^{P}=3/2^{+}, 3/2^{-}, and 5/2^{+}. The partial wave analysis (within the Bonn-Gatchina approach) identifies N(1440)1/2^{+} and the N(ππ)_{S wave} (abbreviated as Nσ here) as further isobars and assigns the final states to the formation of nucleon and Δ resonances and to nonresonant contributions. We observe the known Δ(1232)π decays of Δ(1910)1/2^{+}, Δ(1920)3/2^{+}, Δ(1905)5/2^{+}, Δ(1950)7/2^{+}, and of the corresponding spin-parity series in the nucleon sector, N(1880)1/2^{+}, N(1900)3/2^{+}, N(2000)5/2^{+}, and N(1990)7/2^{+}. For the nucleon resonances, these decay modes are reported here for the first time. Further new decay modes proceed via N(1440)1/2^{+}π, N(1520)3/2^{-}π, N(1680)5/2^{+}π, and Nσ. The latter decay modes are observed in the decay of N^{*} resonances and at most weakly in Δ^{*} decays. It is argued that these decay modes provide evidence for a 3-quark nature of N^{*} resonances rather than a quark-diquark structure.
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Affiliation(s)
- A Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - V Sokhoyan
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - E Gutz
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - H van Pee
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - A V Anisovich
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - J C S Bacelar
- Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen, The Netherlands
| | - B Bantes
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - O Bartholomy
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - D Bayadilov
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - R Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - Yu Beloglazov
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - R Castelijns
- Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen, The Netherlands
| | - V Crede
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - H Dutz
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - D Elsner
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - R Ewald
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - F Frommberger
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - M Fuchs
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - Ch Funke
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - R Gregor
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - A Gridnev
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - W Hillert
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - Ph Hoffmeister
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - I Horn
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - I Jaegle
- Physikalisches Institut, Universität Basel, 4056 Basel, Switzerland
| | - J Junkersfeld
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - H Kalinowsky
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - S Kammer
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - V Kleber
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - Frank Klein
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - Friedrich Klein
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - E Klempt
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - M Kotulla
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
- Physikalisches Institut, Universität Basel, 4056 Basel, Switzerland
| | - B Krusche
- Physikalisches Institut, Universität Basel, 4056 Basel, Switzerland
| | - M Lang
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - H Löhner
- Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen, The Netherlands
| | - I Lopatin
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - S Lugert
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - T Mertens
- Physikalisches Institut, Universität Basel, 4056 Basel, Switzerland
| | - J G Messchendorp
- Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen, The Netherlands
| | - V Metag
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - B Metsch
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - M Nanova
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - V Nikonov
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - D Novinski
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - R Novotny
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - M Ostrick
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - L Pant
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - M Pfeiffer
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - D Piontek
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - A Roy
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - A V Sarantsev
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - Ch Schmidt
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - H Schmieden
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - S Shende
- Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen, The Netherlands
| | - A Süle
- Physikalisches Institut, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - V V Sumachev
- Petersburg Nuclear Physics Institute, Gatchina, Leningrad district 188300, Russia
| | - T Szczepanek
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - U Thoma
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - D Trnka
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - R Varma
- II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - D Walther
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - Ch Wendel
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
| | - A Wilson
- Helmholtz-Institut für Strahlen- und Kernphysik, Friedrich-Wilhelms Universität, 53115 Bonn, Germany
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
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Horn I, Anisovich AV, Anton G, Bantes R, Bartholomy O, Beck R, Beloglazov Y, Bogendörfer R, Castelijns R, Crede V, Ehmanns A, Ernst J, Fabry I, Flemming H, Fösel A, Fuchs M, Funke C, Gothe R, Gridnev A, Gutz E, Höffgen S, Hössl J, Junkersfeld J, Kalinowsky H, Klein F, Klempt E, Koch H, Konrad M, Kopf B, Krusche B, Langheinrich J, Löhner H, Lopatin I, Lotz J, Matthäy H, Menze D, Messchendorp J, Metag V, Nikonov VA, Novinski D, Ostrick M, van Pee H, Sarantsev AV, Schmidt C, Schmieden H, Schoch B, Suft G, Sumachev V, Szczepanek T, Thoma U, Walther D, Weinheimer C. Evidence for a parity doublet Delta(1920)P33 and Delta(1940)D33 from gammap-->ppi;{0}eta. Phys Rev Lett 2008; 101:202002. [PMID: 19113330 DOI: 10.1103/physrevlett.101.202002] [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: 06/26/2008] [Indexed: 05/27/2023]
Abstract
Evidence is reported for the existence of a parity doublet of Delta resonances with total angular momentum J=3/2 from photoproduction of the ppi;{0}eta final state. The two parity partners Delta(1920)P33 and Delta(1940)D33 make significant contributions to the reaction. Cascades of resonances into Delta(1232)eta, N(1535)pi, and Na0(980) are clearly observed.
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Affiliation(s)
- I Horn
- Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany
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Jaegle I, Mertens T, Anisovich AV, Bacelar JCS, Bantes B, Bartholomy O, Bayadilov D, Beck R, Beloglazov YA, Castelijns R, Crede V, Dutz H, Ehmanns A, Elsner D, Essig K, Ewald R, Fabry I, Fuchs M, Funke C, Gothe R, Gregor R, Gridnev AB, Gutz E, Höffgen S, Hoffmeister P, Horn I, Junkersfeld J, Kalinowsky H, Kammer S, Kleber V, Klein F, Klein F, Klempt E, Konrad M, Kotulla M, Krusche B, Lang M, Langheinrich J, Löhner H, Lopatin IV, Lotz J, Lugert S, Menze D, Messchendorp JG, Metag V, Morales C, Nanova M, Nikonov VA, Novinski D, Novotny R, Ostrick M, Pant LM, van Pee H, Pfeiffer M, Radkov A, Roy A, Sarantsev AV, Schadmand S, Schmidt C, Schmieden H, Schoch B, Shende SV, Sokhoyan V, Süle A, Sumachev VV, Szczepanek T, Thoma U, Trnka D, Varma R, Walther D, Weinheimer C, Wendel C. Quasifree photoproduction of eta mesons off the neutron. Phys Rev Lett 2008; 100:252002. [PMID: 18643655 DOI: 10.1103/physrevlett.100.252002] [Citation(s) in RCA: 11] [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: 01/19/2008] [Indexed: 05/26/2023]
Abstract
Quasifree photoproduction of eta mesons off nucleons bound in the deuteron has been measured with the CBELSA/TAPS detector for incident photon energies up to 2.5 GeV at the Bonn ELSA accelerator. The eta mesons have been detected in coincidence with recoil protons and recoil neutrons, which allows a detailed comparison of the quasifree n(gamma,eta)n and p(gamma,eta)p reactions. The excitation function for eta production off the neutron shows a pronounced bumplike structure at W=1.68 GeV (E{gamma} approximately 1 GeV), which is absent for the proton.
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Affiliation(s)
- I Jaegle
- Department Physik, Universität Basel, Switzerland
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4
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Aggarwal MM, Ahammed Z, Angelis ALS, Antonenko V, Arefiev V, Astakhov V, Avdeitchikov V, Awes TC, Baba PVKS, Badyal SK, Bathe S, Batiounia B, Baumann C, Bernier T, Bhalla KB, Bhatia VS, Blume C, Bucher D, Büsching H, Carlén L, Chattopadhyay S, Decowski MP, Delagrange H, Donni P, Majumdar MRD, El Chenawi K, Dubey AK, Enosawa K, Fokin S, Frolov V, Ganti MS, Garpman S, Gavrishchuk O, Geurts FJM, Ghosh TK, Glasow R, Guskov B, Gustafsson HA, Gutbrod HH, Hrivnacova I, Ippolitov M, Kalechofsky H, Kamermans R, Karadjev K, Karpio K, Kolb BW, Kosarev I, Koutcheryaev I, Kugler A, Kulinich P, Kurata M, Lebedev A, Löhner H, Luquin L, Mahapatra DP, Manko V, Martin M, Martínez G, Maximov A, Miake Y, Mishra GC, Mohanty B, Mora MJ, Morrison D, Mukhanova T, Mukhopadhyay DS, Naef H, Nandi BK, Nayak SK, Nayak TK, Nianine A, Nikitine V, Nikolaev S, Nilsson P, Nishimura S, Nomokonov P, Nystrand J, Oskarsson A, Otterlund I, Pavliouk S, Peitzmann T, Peressounko D, Petracek V, Phatak SC, Pinganaud W, Plasil F, Purschke ML, Rak J, Rammler M, Raniwala R, Raniwala S, Rao NK, Retiere F, Reygers K, Roland G, Rosselet L, Roufanov I, Roy C, Rubio JM, Sambyal SS, Santo R, Sato S, Schlagheck H, Schmidt HR, Schutz Y, Shabratova G, Shah TH, Sibiriak I, Siemiarczuk T, Silvermyr D, Sinha BC, Slavine N, Söderström K, Sood G, Sørensen SP, Stankus P, Stefanek G, Steinberg P, Stenlund E, Sumbera M, Svensson T, Tsvetkov A, Tykarski L, V D Pijll EC, V Eijndhoven N, V Nieuwenhuizen GJ, Vinogradov A, Viyogi YP, Vodopianov A, Vörös S, Wysłouch B, Young GR. Suppression of high-p{T} neutral pion production in central Pb+Pb collisions at sqrt[S{NN}]=17.3 GeV relative to p+C and p+Pb collisions. Phys Rev Lett 2008; 100:242301. [PMID: 18643578 DOI: 10.1103/physrevlett.100.242301] [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: 08/21/2007] [Revised: 05/12/2008] [Indexed: 05/26/2023]
Abstract
Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sqrt[S{NN}]=17.4 GeV at midrapidity (2.3 less than or approximately equal eta{lab} less than or approximately equal 3.0) over the range 0.7 less than or approximately equal p{T} less than or approximately equal 3.5 GeV/c. The spectra are compared to pi{0} spectra measured in Pb+Pb collisions at sqrt[S{NN}]=17.3 GeV in the same experiment. For a wide range of Pb+Pb centralities (N{part} less than or approximately equal 300), the yield of pi{0}'s with p{T} greater than or approximately equal 2 GeV/c is larger than or consistent with the p+C or p+Pb yields scaled with the number of nucleon-nucleon collisions (N{coll}), while for central Pb+Pb collisions with N{part}greater than or approximately equal 350, the pi{0} yield is suppressed.
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Kotulla M, Trnka D, Mühlich P, Anton G, Bacelar JCS, Bartholomy O, Bayadilov D, Beloglazov YA, Bogendörfer R, Castelijns R, Crede V, Dutz H, Ehmanns A, Elsner D, Ewald R, Fabry I, Fuchs M, Essig K, Funke C, Gothe R, Gregor R, Gridnev AB, Gutz E, Höffgen S, Hoffmeister P, Horn I, Hössl J, Jaegle I, Junkersfeld J, Kalinowsky H, Klein F, Klein F, Klempt E, Konrad M, Kopf B, Krusche B, Langheinrich J, Löhner H, Lopatin IV, Lotz J, Lugert S, Menze D, Messchendorp JG, Mertens T, Metag V, Mosel U, Nanova M, Novotny R, Ostrick M, Pant LM, van Pee H, Pfeiffer M, Roy A, Radkov A, Schadmand S, Schmidt C, Schmieden H, Schoch B, Shende S, Suft G, Sumachev VV, Szczepanek T, Süle A, Thoma U, Varma R, Walther D, Weinheimer C, Wendel C. Modification of the omega-meson lifetime in nuclear matter. Phys Rev Lett 2008; 100:192302. [PMID: 18518443 DOI: 10.1103/physrevlett.100.192302] [Citation(s) in RCA: 4] [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: 12/10/2007] [Indexed: 05/26/2023]
Abstract
Information on hadron properties in the nuclear medium has been derived from the photoproduction of omega mesons on the nuclei C, Ca, Nb, and Pb using the Crystal Barrel/TAPS detector at the ELSA tagged photon facility in Bonn. The dependence of the omega-meson cross section on the nuclear mass number has been compared with three different types of models: a Glauber analysis, a Boltzmann-Uehling-Uhlenbeck analysis of the Giessen theory group, and a calculation by the Valencia theory group. In all three cases, the inelastic omega width is found to be 130-150 MeV/c(2) at normal nuclear matter density for an average 3-momentum of 1.1 GeV/c. In the rest frame of the omega meson, this inelastic omega width corresponds to a reduction of the omega lifetime by a factor approximately 30. For the first time, the momentum dependent omegaN cross section has been extracted from the experiment and is in the range of 70 mb.
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Affiliation(s)
- M Kotulla
- II Physikalisches Institut, Universität Giessen, Giessen, Germany
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6
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Trnka D, Anton G, Bacelar JCS, Bartholomy O, Bayadilov D, Beloglazov YA, Bogendörfer R, Castelijns R, Crede V, Dutz H, Ehmanns A, Elsner D, Ewald R, Fabry I, Fuchs M, Essig K, Funke C, Gothe R, Gregor R, Gridnev AB, Gutz E, Höffgen S, Hoffmeister P, Horn I, Hössl J, Jaegle I, Junkersfeld J, Kalinowsky H, Klein F, Klein F, Klempt E, Konrad M, Kopf B, Kotulla M, Krusche B, Langheinrich J, Löhner H, Lopatin IV, Lotz J, Lugert S, Menze D, Messchendorp JG, Mertens T, Metag V, Morales C, Nanova M, Novotny R, Ostrick M, Pant LM, van Pee H, Pfeiffer M, Roy A, Radkov A, Schadmand S, Schmidt C, Schmieden H, Schoch B, Shende S, Suft G, Sumachev VV, Szczepanek T, Süle A, Thoma U, Varma R, Walther D, Weinheimer C, Wendel C. Observation of in-medium modifications of the omega meson. Phys Rev Lett 2005; 94:192303. [PMID: 16090166 DOI: 10.1103/physrevlett.94.192303] [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: 02/15/2005] [Indexed: 05/03/2023]
Abstract
The photoproduction of omega mesons on nuclei has been investigated using the Crystal Barrel/TAPS experiment at the ELSA tagged photon facility in Bonn. The aim is to study possible in-medium modifications of the omega meson via the reaction gamma + A --> omega + X --> pi(0)gamma + X('). Results obtained for Nb are compared to a reference measurement on a LH2 target. While for recoiling, long-lived mesons (pi(0), eta, and eta;(')), which decay outside of the nucleus, a difference in the line shape for the two data samples is not observed, we find a significant enhancement towards lower masses for omega mesons produced on the Nb target. For momenta less than 500 MeV/c an in-medium omega meson mass of M(medium) = [722(+4)(-4)(stat)+35-5(syst)] MeV/c(2) has been deduced at an estimated average nuclear density of 0.6rho(0).
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Affiliation(s)
- D Trnka
- II. Physikalisches Institut, Universität Giessen, Germany
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7
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Credé V, Bartholomy O, Anisovich AV, Anton G, Bantes R, Beloglazov Y, Bogendörfer R, Castelijns R, Ehmanns A, Ernst J, Fabry I, Flemming H, Fösel A, Freiesleben H, Fuchs M, Funke C, Gothe R, Gridnev A, Gutz E, Höffgen SK, Horn I, Hössl J, Joosten R, Junkersfeld J, Kalinowsky H, Klein F, Klempt E, Koch H, Konrad M, Kopf B, Krusche B, Langheinrich J, Löhner H, Lopatin I, Lotz J, Matthäy H, Menze D, Messchendorp J, Morales C, Novinski D, Ostrick M, van Pee H, Radkov A, Reinnarth J, Sarantsev AV, Schadmand S, Schmidt C, Schmieden H, Schoch B, Suft G, Sumachev V, Szczepanek T, Thoma U, Walther D, Weinheimer C. Photoproduction of eta mesons off protons for 0.75 GeV<E(gamma)<3 GeV. Phys Rev Lett 2005; 94:012004. [PMID: 15698071 DOI: 10.1103/physrevlett.94.012004] [Citation(s) in RCA: 10] [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: 11/29/2003] [Revised: 07/14/2004] [Indexed: 05/24/2023]
Abstract
Total and differential cross sections for the reaction p(gamma,eta)p have been measured for photon energies in the range from 750 MeV to 3 GeV. The low-energy data are dominated by the S11 wave which has two poles in the energy region below 2 GeV. Eleven nucleon resonances are observed in their decay into peta. At medium energies we find evidence for a new resonance N(2070)D15 with (M,Gamma)=(2068+/-22, 295+/-40) MeV. At gamma energies above 1.5 GeV, a strong peak in the forward direction develops, signaling the exchange of vector mesons in the t channel.
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Affiliation(s)
- V Credé
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany
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8
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Bartholomy O, Credé V, van Pee H, Anisovich AV, Anton G, Bantes R, Beloglazov Y, Bogendörfer R, Castelijns R, Ehmanns A, Ernst J, Fabry I, Flemming H, Fösel A, Freiesleben H, Fuchs M, Funke C, Gothe R, Gridnev A, Gutz E, Höffgen SK, Horn I, Hössl J, Joosten R, Junkersfeld J, Kalinowsky H, Klein F, Klempt E, Koch H, Konrad M, Kopf B, Krusche B, Langheinrich J, Löhner H, Lopatin I, Lotz J, Matthäy H, Menze D, Messchendorp J, Morales C, Novinski D, Ostrick M, Radkov A, Reinnarth J, Sarantsev AV, Schadmand S, Schmidt C, Schmieden H, Schoch B, Suft G, Sumachev V, Szczepanek T, Thoma U, Walther D, Weinheimer C. Neutral-pion photoproduction off protons in the energy range 0.3 GeV<E(gamma)<3 GeV. Phys Rev Lett 2005; 94:012003. [PMID: 15698070 DOI: 10.1103/physrevlett.94.012003] [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: 07/14/2004] [Indexed: 05/24/2023]
Abstract
Single pi(0) photoproduction has been studied with the CB-ELSA experiment at Bonn using tagged photon energies between 0.3 and 3.0 GeV. The experimental setup covers a very large solid angle of approximately 98% of 4pi. Differential cross sections dsigma/dOmega have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the s channel intermediate state gammap-->N(*)(Delta(*))-->ppi(0). A combined analysis including the data presented in this letter along with other data sets reveals contributions from known resonances and evidence for a new resonance N(2070)D15.
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Affiliation(s)
- O Bartholomy
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany
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9
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Aggarwal MM, Ahammed Z, Angelis ALS, Antonenko V, Arefiev V, Astakhov V, Avdeitchikov V, Awes TC, Baba PVKS, Badyal SK, Bathe S, Batiounia B, Bernier T, Bhalla KB, Bhatia VS, Blume C, Bucher D, Büsching H, Carlén L, Chattopadhyay S, Decowski MP, Delagrange H, Donni P, Dutta Majumdar MR, el Chenawi K, Dubey AK, Enosawa K, Fokin S, Frolov V, Ganti MS, Garpman S, Gavrishchuk O, Geurts FJM, Ghosh TK, Glasow R, Guskov B, Gustafsson HA, Gutbrod HH, Hrivnacova I, Ippolitov M, Kalechofsky H, Karadjev K, Karpio K, Kolb BW, Kosarev I, Koutcheryaev I, Kugler A, Kulinich P, Kurata M, Lebedev A, Löhner H, Luquin L, Mahapatra DP, Manko V, Martin M, Martínez G, Maximov A, Miake Y, Mishra GC, Mohanty B, Mora MJ, Morrison D, Moukhanova T, Mukhopadhyay DS, Naef H, Nandi BK, Nayak SK, Nayak TK, Nianine A, Nikitine V, Nikolaev S, Nilsson P, Nishimura S, Nomokonov P, Nystrand J, Oskarsson A, Otterlund I, Peitzmann T, Peressounko D, Petracek V, Phatak SC, Pinganaud W, Plasil F, Purschke ML, Rak J, Raniwala R, Raniwala S, Rao NK, Retiere F, Reygers K, Roland G, Rosselet L, Roufanov I, Roy C, Rubio JM, Sambyal SS, Santo R, Sato S, Schlagheck H, Schmidt HR, Schutz Y, Shabratova G, Shah TH, Sibiriak I, Siemiarczuk T, Silvermyr D, Sinha BC, Slavine N, Söderström K, Sood G, Sørensen SP, Stankus P, Stefanek G, Steinberg P, Stenlund E, Sumbera M, Svensson T, Tsvetkov A, Tykarski L, v d Pijll EC, von Eijndhoven N, von Nieuwenhuizen GJ, Vinogradov A, Viyogi YP, Vodopianov A, Vörös S, Wysłouch B, Young GR. Interferometry of direct photons in central 208Pb + 208Pb collisions at 158A GeV. Phys Rev Lett 2004; 93:022301. [PMID: 15323905 DOI: 10.1103/physrevlett.93.022301] [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: 10/22/2003] [Indexed: 05/24/2023]
Abstract
Two-particle correlations of direct photons were measured in central 208Pb+208Pb collisions at 158A GeV. The invariant interferometric radii were extracted for 100<K(T)<300 MeV/c and compared to radii extracted from charged pion correlations. The yield of soft direct photons, K(T)<300 MeV/c, was extracted from the correlation strength and compared to theoretical calculations.
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10
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Volkerts M, Bacelar JCS, van Goethem MJ, Harakeh MN, Hoefman M, Huisman H, Kalantar-Nayestanaki N, Kopecky S, Löhner H, Messchendorp JG, Nakayama K, Ostendorf RW, Schadmand S, Scholten O, Wilschut HW. Exclusive measurement of quasifree proton-neutron bremsstrahlung. Phys Rev Lett 2004; 92:202301. [PMID: 15169344 DOI: 10.1103/physrevlett.92.202301] [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: 04/16/2003] [Revised: 01/08/2004] [Indexed: 05/24/2023]
Abstract
Data on proton-neutron bremsstrahlung have been obtained from a measurement of the quasifree breakup channel in proton-deuteron bremsstrahlung. This high-precision measurement, with an incident proton energy of 190 MeV, is fully exclusive; i.e., the protons, the neutron, and the photon have been detected. The quasifree differential cross sections obtained are compared with microscopic calculations and calculations based on soft-photon models. There are sizable differences between the models and also between the models and the data obtained for this simple process.
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Affiliation(s)
- M Volkerts
- Kernfysisch Versneller Instituut (KVI), Zernikelaan 25, 9747 AA Groningen, The Netherlands
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11
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Volkerts M, Bacelar JCS, van Goethem MJ, Harakeh MN, Hoefman M, Huisman H, Kalantar-Nayestanaki N, Löhner H, Messchendorp JG, Ostendorf RW, Schadmand S, Scholten O, Wilschut HW, Simon RS, Wagner V. Exclusive measurement of coherent proton-deuteron bremsstrahlung. Phys Rev Lett 2003; 90:062301. [PMID: 12633288 DOI: 10.1103/physrevlett.90.062301] [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: 10/31/2002] [Indexed: 05/24/2023]
Abstract
For the first time a high-precision proton-deuteron bremsstrahlung experiment has been performed in which all the different exit channels have been distinguished separately. High-precision cross sections and analyzing powers in one of the outgoing channels, namely, the coherent bremsstrahlung with a proton and a deuteron in the final state, are presented at 190 MeV incoming proton beam energy and are compared to calculations based on the low-energy theorem. The results of the calculations vary considerably calling for a fully microscopic calculation. However, using a recipe including the initial- and final-state interactions, the predictions come close to the data.
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Affiliation(s)
- M Volkerts
- Kernfysisch Versneller Instituut, Zernikelaan 25, 9747 AA Groningen, The Netherlands
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12
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van Goethem MJ, Aphecetche L, Bacelar JCS, Delagrange H, Díaz J, d'Enterria D, Hoefman M, Holzmann R, Huisman H, Kalantar-Nayestanaki N, Kugler A, Löhner H, Martínez G, Messchendorp JG, Ostendorf RW, Schadmand S, Siemssen RH, Simon RS, Schutz Y, Turrisi R, Volkerts M, Wagner V, Wilschut HW. Suppression of soft nuclear bremsstrahlung in proton-nucleus collisions. Phys Rev Lett 2002; 88:122302. [PMID: 11909450 DOI: 10.1103/physrevlett.88.122302] [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: 11/30/2001] [Indexed: 05/23/2023]
Abstract
Photon energy spectra up to the kinematic limit have been measured in 190 MeV proton reactions with light and heavy nuclei to investigate the influence of the multiple-scattering process on the photon production. Relative to the predictions of models based on a quasifree production mechanism, a strong suppression of bremsstrahlung is observed in the low-energy region of the photon spectrum. We attribute this effect to the interference of photon amplitudes due to multiple scattering of nucleons in the nuclear medium.
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Affiliation(s)
- M J van Goethem
- Kernfysisch Versneller Instituut, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands
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13
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Sauvan E, Marqués FM, Wilschut HW, Orr NA, Angélique JC, Borcea C, Catford WN, Clarke NM, Descouvemont P, Díaz J, Grévy S, Kugler A, Kravchuk V, Labiche M, Le Brun C, Lienard E, Löhner H, Mittig W, Ostendorf RW, Pietri S, Roussel-Chomaz P, Saint Laurent MG, Savajols H, Wagner V, Yahlali N. Radiative proton capture on (6)He. Phys Rev Lett 2001; 87:042501. [PMID: 11461610 DOI: 10.1103/physrevlett.87.042501] [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: 02/20/2001] [Indexed: 05/23/2023]
Abstract
Radiative capture of protons is investigated as a probe of clustering in nuclei far from stability. The first such measurement on a halo nucleus is reported here for the reaction 6He(p,gamma) at 40 MeV. Capture into 7Li is observed as the strongest channel. In addition, events have been recorded that may be described by quasifree capture on a halo neutron, the alpha core, and 5He. The possibility of describing such events by capture into the continuum of 7Li is also discussed.
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Affiliation(s)
- E Sauvan
- Laboratoire de Physique Corpusculaire, IN2P3-CNRS, ISMRA et Université de Caen, F-14050 Caen Cedex, France
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14
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Aggarwal MM, Agnihotri A, Ahammed Z, Angelis AL, Antonenko V, Arefiev V, Astakhov V, Avdeitchikov V, Awes TC, Baba PV, Badyal SK, Barlag C, Bathe S, Batiounia B, Bernier T, Bhalla KB, Bhatia VS, Blume C, Bock R, Bohne EM, Böröcz Z, Bucher D, Buijs A, Büsching H, Carlen L, Chalyshev V, Chattopadhyay S, Cherbatchev R, Chujo T, Claussen A, Das AC, Decowski MP, Delagrange H, Djordjadze V, Donni P, Doubovik I, Dutt S, Dutta Majumdar MR, El Chenawi K, Eliseev S, Enosawa K, Foka P, Fokin S, Ganti MS, Garpman S, Gavrishchuk O, Geurts FJ, Ghosh TK, Glasow R, Gupta SK, Guskov B, Gustafsson HA, Gutbrod HH, Higuchi R, Hrivnacova I, Ippolitov M, Kalechofsky H, Kamermans R, Kampert KH, Karadjev K, Karpio K, Kato S, Kees S, Klein-Bösing C, Knoche S, Kolb BW, Kosarev I, Koutcheryaev I, Krümpel T, Kugler A, Kulinich P, Kurata M, Kurita K, Kuzmin N, Langbein I, Lebedev A, Lee YY, Löhner H, Luquin L, Mahapatra DP, Manko V, Martin M, Martínez G, Maximov A, Mgebrichvili G, Miake Y, Mir MF, Mishra GC, Miyamoto Y, Mohanty B, Mora MJ, Morrison D, Mukhopadhyay DS, Naef H, Nandi BK, Nayak SK, Nayak TK, Neumaier S, Nianine A, Nikitine V, Nikolaev S, Nilsson P, Nishimura S, Nomokonov P, Nystrand J, Obenshain FE, Oskarsson A, Otterlund I, Pachr M, Pavliouk S, Peitzmann T, Petracek V, Pinganaud W, Plasil F, von Poblotzki U, Purschke ML, Rak J, Raniwala R, Raniwala S, Ramamurthy VS, Rao NK, Retiere F, Reygers K, Roland G, Rosselet L, Roufanov I, Roy C, Rubio JM, Sako H, Sambyal SS, Santo R, Sato S, Schlagheck H, Schmidt HR, Schutz Y, Shabratova G, Shah TH, Sibiriak I, Siemiarczuk T, Silvermyr D, Sinha BC, Slavine N, Söderström K, Solomey N, Sørensen SP, Stankus P, Stefanek G, Steinberg P, Stenlund E, Stüken D, Sumbera M, Svensson T, Trivedi MD, Tsvetkov A, Tykarski L, Urbahn J, Pijll EC, Eijndhoven N, Nieuwenhuizen GJ, Vinogradov A, Viyogi YP, Vodopianov A, Vörös S, Wysłouch B, Yagi K, Yokota Y, Young GR. Three-pion interferometry results from central Pb+Pb collisions at 158A GeV/c. Phys Rev Lett 2000; 85:2895-2899. [PMID: 11005962 DOI: 10.1103/physrevlett.85.2895] [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: 04/10/2000] [Indexed: 05/23/2023]
Abstract
Three-particle correlations have been measured for identified pi(-) from central 158A GeV Pb+Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source.
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15
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Albrecht R, Antonenko V, Awes TC, Barlag C, Berger F, Bloomer M, Blume C, Bock D, Bock R, Bohne E, Bucher D, Claesson G, Claussen A, Clewing G, Debbe R, Dragon L, Dubovik Y, Eklund A, Fokin S, Franz A, Garpman S, Glasow R, Gustafsson HÅ, Gutbrod HH, Hansen O, Hölker G, Idh J, Ippolitov M, Jacobs P, Kampert KH, Karadjev K, Kolb BW, Lebedev A, Löhner H, Lund I, Manko V, Moskowitz B, Nikolaev S, Nystrand J, Obenshain FE, Oskarsson A, Otterlund I, Peitzmann T, Plasil F, Poskanzer AM, Purschke M, Ritter H, Roters B, Saini S, Santo R, Schlagheck H, Schmidt HR, Söderström K, Sorensen SP, Stankus PW, Steffens K, Steinhaeuser P, Stenlund E, Stüken D, Vinogradov A, Wegner H, Young GR. Limits on the production of direct protons in 200A GeV 32S+Au collisions. Phys Rev Lett 1996; 76:3506-3509. [PMID: 10060985 DOI: 10.1103/physrevlett.76.3506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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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16
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Gudima KK, Matulewicz T, Delagrange H, Marqués FM, Martínez G, Ostendorf RW, Ploszajczak M, Schutz Y, Toneev VD, Bozek P, Hlavác S, Holzmann R, Schubert A, Simon RS, Wagner V, Löhner H, Siemssen RH, Wilschut HW, Díaz J, Marín A. Subthreshold pion dynamics as a source for hard photons beyond proton-neutron Bremsstrahlung in heavy-ion collisions. Phys Rev Lett 1996; 76:2412-2415. [PMID: 10060693 DOI: 10.1103/physrevlett.76.2412] [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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17
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Wilschut HW, Löhner H, Siemssen RH, Lautridou P, Lefèvre F, Matulewicz T, Marqués M, Mittig W, Ostendorf RW, Roussel-Chomaz P, Schutz Y, Hlavác S, Holzmann R, Schubert A, Simon RS, Wagner V, Franke M, Kühn W, Notheisen M, Novotny R, Ballester F, Díaz J, Marín A, Martínez G, Kugler A. Importance of one- and two-body dissipation at intermediate energies studied by hard photons. Phys Rev Lett 1996; 76:1425-1428. [PMID: 10061720 DOI: 10.1103/physrevlett.76.1425] [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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18
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Albrecht R, Antonenko A, Awes TC, Berger F, Bloomer MA, Bock D, Bock R, Claesson G, Clewing G, Dragon L, Eklund A, Fokin S, Franz A, Garpman S, Glasow R, Gustafsson H, Gutbrod HH, Hartig M, He X, Hölker G, Idh J, Ippolitov M, Jacobs P, Kampert KH, Karadjev K, Kolb BW, Lebedev A, Löhner H, Lund I, Manko V, Nikolaev S, Nystrand J, Obenshain FE, Oskarsson A, Otterlund I, Peitzmann T, Plasil F, Poskanzer AM, Purschke M, Ritter H, Roters B, Saini S, Santo R, Schmidt HR, Söderström K, Sorensen SP, Steffens K, Steinhäuser P, Stenlund E, Stüken D, Vinogradov A, Young GR. Intermittency and correlations in 200 GeV/nucleon S+S and S+Au collisions. Phys Rev C Nucl Phys 1994; 50:1048-1064. [PMID: 9969748 DOI: 10.1103/physrevc.50.1048] [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: 05/22/2023]
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19
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Marqués M, Ostendorf RW, Lautridou P, Lefèvre F, Matulewicz T, Mittig W, Roussel-Chomaz P, Schutz Y, Québert J, Díaz J, Marín A, Martínez G, Holzmann R, Hlávac S, Schubert A, Simon RS, Wagner V, Löhner H, Siemssen RH, Wilschut HW, Franke M, Sujkowski Z. Hard photon intensity interferometry in heavy ion reactions. Phys Rev Lett 1994; 73:34-37. [PMID: 10056713 DOI: 10.1103/physrevlett.73.34] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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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20
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Schubert A, Holzmann R, Hlavác S, Kulessa R, Niebur W, Simon RS, Lautridou P, Lefèvre F, Marqués M, Matulewicz T, Mittig W, Ostendorf RW, Roussel-Chomaz P, Schutz Y, Löhner H, Siemssen RH, Wilschut HW, Ballester F, Díaz J, Marín A, Martínez G, Metag V, Novotny R, Wagner V, Québert J. Evidence for stopping in heavy-ion collisions from a study of hard-photon source velocities. Phys Rev Lett 1994; 72:1608-1611. [PMID: 10055655 DOI: 10.1103/physrevlett.72.1608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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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21
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Berg F, Pfeiffer M, Schwalb O, Franke M, Kühn W, Löhner H, Metag V, Notheisen M, Novotny R, Raschke AE, Ritman J, Röbig-Landau M, Simon RS, Sumbera M, Venema L, Wilschut H. Transverse momentum distributions of eta mesons in near-threshold relativistic heavy ion reactions. Phys Rev Lett 1994; 72:977-980. [PMID: 10056586 DOI: 10.1103/physrevlett.72.977] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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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22
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Venema LB, Braak H, Löhner H, Raschke AE, Siemssen RH, Sumbera M, Wilschut HW, Berg F, Kühn W, Metag V, Notheisen M, Novotny R, Pfeiffer M, Ritman J, Schwalb O, Gobbi A, Hildenbrand KD, Hlavác S, Holzmann R, Simon RS, Sodan U, Teh K, Wessels JP, Herrmann N, Wienold T, Kotte R, Mösner J, Neubert W, Wohlfarth D, Ostendorf R, Schutz Y, Brummund N, Santo R. Azimuthal asymmetry of neutral pion emission in Au+Au reactions at 1 GeV/nucleon. Phys Rev Lett 1993; 71:835-838. [PMID: 10055380 DOI: 10.1103/physrevlett.71.835] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [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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23
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Albrecht R, Awes TC, Baktash C, Beckmann P, Berger F, Bloomer MA, Bock D, Bock R, Claesson G, Clewing G, Dragon L, Eklund A, Ferguson R, Franz A, Garpman SIA, Glasow R, Gustafsson HÅ, Gutbrod HH, Hölker G, Idh J, Jacobs P, Kampert KH, Kolb BW, Löhner H, Lund I, Obenshain FE, Oskarsson A, Otterlund I, Peitzmann T, Plasil F, Poskanzer AM, Purschke ML, Ritter HG, Roters B, Saini S, Santo R, Schmidt HR, Sorensen SP, Steinhaeuser P, Steffens K, Stenlund E, Stüken D, Young GR. Production of slow singly charged fragments in 200 GeV/c hadron nucleus interactions. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01555736] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Mayer RS, Henning W, Holzmann R, Simon RS, Delagrange H, Lefèvre F, Matulewicz T, Merrouch R, Mittig W, Ostendorf RW, Schutz Y, Berg FD, Kühn W, Metag V, Novotny R, Pfeiffer M, Boonstra AL, Löhner H, Venema LB, Wilschut HW, Ardouin D, Dabrowski H, Erazmus B, Lebrun C, Sézac L, Ballester F, Casal E, Díaz J, Ferrero JL, Marqués M, Martínez G, Nifenecker H, Fornal B, Freindl L, Sujkowski Z. Investigation of pion absorption in heavy-ion induced subthreshold pi 0 production. Phys Rev Lett 1993; 70:904-907. [PMID: 10054234 DOI: 10.1103/physrevlett.70.904] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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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Ritman J, Berg F, Kühn W, Metag V, Novotny R, Notheisen M, Paul P, Pfeiffer M, Schwalb O, Löhner H, Venema L, Gobbi A, Herrmann N, Hildenbrand KD, Mösner J, Simon RS, Teh K, Wessels JP, Wienold T. First observation of the Coulomb-excited double giant dipole resonance in 208Pb via double- gamma decay. Phys Rev Lett 1993; 70:533-536. [PMID: 10054138 DOI: 10.1103/physrevlett.70.533] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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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Albrecht R, Awes TC, Beckmann P, Berger F, Bloomer MA, Bock D, Bock R, Claesson G, Clewing G, Dragon L, Eklund A, Ferguson RL, Franz A, Garpman S, Glasow R, Gustafsson HÅ, Gutbrod HH, Hartig M, Hölker G, Idh J, Jacobs P, Kampert KH, Kolb BW, Kristiansson P, Löhner H, Lund I, Obenshain FE, Oskarsson A, Otterlund I, Peitzmann T, Persson S, Plasil F, Poskanzer AM, Purschke M, Ritter HG, Roters B, Saini S, Santo R, Schmidt HR, Schmidt R, Sørensen SP, Steffens K, Steinhauser P, Stenlund E, Stüken D, Tincknell ML, Twyhues A, Young GR. Bose-einstein correlations in the target fragmentation region in 200A GeV16O+nucleus collisions. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf01597558] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Doss KG, Gustafsson H, Gutbrod HH, Hahn D, Kampert K, Kolb B, Löhner H, Poskanzer AM, Ritter HG, Schmidt HR, Stöcker H. Multiplicity and bombarding energy dependence of the entropy in relativistic heavy-ion reactions. Phys Rev C Nucl Phys 1988; 37:163-168. [PMID: 9954425 DOI: 10.1103/physrevc.37.163] [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: 05/22/2023]
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Doss KG, Gustafsson H, Gutbrod HH, Kampert KH, Kolb B, Löhner H, Ludewigt B, Poskanzer AM, Ritter HG, Schmidt HR, Wieman H. Nuclear collective flow as a function of projectile energy and mass. Phys Rev Lett 1986; 57:302-305. [PMID: 10034025 DOI: 10.1103/physrevlett.57.302] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [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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Doss KG, Gustafsson H, Gutbrod HH, Kolb B, Löhner H, Ludewigt B, Poskanzer AM, Renner T, Riedesel H, Ritter HG, Warwick A, Wieman H. Composite particles and entropy production in relativistic nuclear collisions. Phys Rev C Nucl Phys 1985; 32:116-123. [PMID: 9952810 DOI: 10.1103/physrevc.32.116] [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: 05/22/2023]
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Baden A, Gutbrod H, Löhner H, Maier M, Poskanzer A, Renner T, Riedesel H, Ritter H, Spieler H, Warwick A, Weik F, Wieman H. The plastic ball spectrometer: An electronic 4τ detector with particle identification. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/0167-5087(82)90628-7] [Citation(s) in RCA: 153] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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