Phys. Rev. C
69,
045203
(2004)
[15 pages]
Backward electroproduction of π0 mesons on protons in the region of nucleon resonances at four momentum transfer squared Q2=1.0 GeV2
G. Laveissière et al. Jefferson Lab Hall A Collaboration
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G. Laveissière1, N. Degrande2, S. Jaminion1, C. Jutier1,3, L. Todor3, R. Di Salvo1, L. Van Hoorebeke2, L. C. Alexa4, B. D. Anderson5, K. A. Aniol6, K. Arundell7, G. Audit8, L. Auerbach9, F. T. Baker10, M. Baylac8, J. Berthot1, P. Y. Bertin1, W. Bertozzi11, L. Bimbot12, W. U. Boeglin13, E. J. Brash4, V. Breton1, H. Breuer14, E. Burtin8, J. R. Calarco15, L. S. Cardman16, C. Cavata8, C.-C. Chang14, J.-P. Chen16, E. Chudakov16, E. Cisbani17, D. S. Dale18, C. W. de Jager16, R. De Leo19, A. Deur1,16, N. d’Hose8, G. E. Dodge3, J. J. Domingo16, L. Elouadrhiri16, M. B. Epstein6, L. A. Ewell14, J. M. Finn7, K. G. Fissum11, H. Fonvieille1, G. Fournier8, B. Frois8, S. Frullani17, C. Furget20, H. Gao11, J. Gao11, F. Garibaldi17, A. Gasparian21,18, S. Gilad11, R. Gilman22,16, A. Glamazdin23, C. Glashausser22, J. Gomez16, V. Gorbenko23, P. Grenier1, P. A. M. Guichon8, J. O. Hansen16, R. Holmes24, M. Holtrop15, C. Howell25, G. M. Huber4, C. E. Hyde-Wright3, S. Incerti9, M. Iodice17, J. Jardillier8, M. K. Jones7, W. Kahl24, S. Kamalov26, S. Kato27, A. T. Katramatou5, J. J. Kelly14, S. Kerhoas8, A. Ketikyan28, M. Khayat5, K. Kino29, S. Kox20, L. H. Kramer13, K. S. Kumar30, G. Kumbartzki22, M. Kuss16, A. Leone31, J. J. LeRose16, M. Liang16, R. A. Lindgren32, N. Liyanage11, G. J. Lolos4, R. W. Lourie33, R. Madey5, K. Maeda29, S. Malov22, D. M. Manley5, C. Marchand8, D. Marchand8, D. J. Margaziotis6, P. Markowitz13, J. Marroncle8, J. Martino8, K. McCormick3, J. McIntyre22, S. Mehrabyan28, F. Merchez20, Z. E. Meziani9, R. Michaels16, G. W. Miller30, J. Y. Mougey20, S. K. Nanda16, D. Neyret8, E. A. J. M. Offermann16, Z. Papandreou4, C. F. Perdrisat7, R. Perrino31, G. G. Petratos5, S. Platchkov8, R. Pomatsalyuk23, D. L. Prout5, V. A. Punjabi34, T. Pussieux8, G. Quémenér1,7, R. D. Ransome22, O. Ravel1, J. S. Real20, F. Renard8, Y. Roblin1, D. Rowntree11, G. Rutledge7, P. M. Rutt22, A. Saha16, T. Saito29, A. J. Sarty35, A. Serdarevic4,16, T. Smith15, G. Smirnov1, K. Soldi36, P. Sorokin23, P. A. Souder24, R. Suleiman11, J. A. Templon10, T. Terasawa29, L. Tiator26, R. Tieulent20, E. Tomasi-Gustaffson8, H. Tsubota29, H. Ueno27, P. E. Ulmer3, G. M. Urciuoli17, R. Van De Vyver2, R. L. J. Van der Meer16,4, P. Vernin8, B. Vlahovic16,36, H. Voskanyan28, E. Voutier20, J. W. Watson5, L. B. Weinstein3, K. Wijesooriya7, R. Wilson37, B. B. Wojtsekhowski16, D. G. Zainea4, W-M. Zhang5, J. Zhao11, and Z.-L. Zhou11 (Jefferson Lab Hall A Collaboration)
1Université Blaise Pascal/IN2P3, F-63177 Aubière, France
2University of Gent, B-9000 Gent, Belgium
3Old Dominion University, Norfolk, Virginia 23529, USA
4University of Regina, Regina, Canada SK S4S OA2
5Kent State University, Kent, Ohio 44242, USA
6California State University, Los Angeles, California 90032, USA
7College of William and Mary, Williamsburg, Virginia 23187, USA
8CEA Saclay, F-91191 Gif-sur-Yvette, France
9Temple University, Philadelphia, Pennsylvania 19122, USA
10University of Georgia, Athens, Georgia 30602, USA
11Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
12Institut de Physique Nucléaire, F-91406 Orsay, France
13Florida International University, Miami, Florida 33199, USA
14University of Maryland, College Park, Maryland 20742, USA
15University of New Hampshire, Durham, New Hampshire 03824, USA
16Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
17INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
18University of Kentucky, Lexington, Kentucky 40506, USA
19INFN, Sezione di Bari and University of Bari, 70126 Bari, Italy
20Laboratoire de Physique Subatomique et de Cosmologie, F-38026 Grenoble, France
21Hampton University, Hampton, Virginia 23668, USA
22Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
23Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
24Syracuse University, Syracuse, New York 13244, USA
25Duke University, Durham, North Carolina 27706, USA
26Institut fuer Kernphysik, University of Mainz, D-55099 Mainz, Germany
27Yamagata University, Yamagata 990, Japan
28Yerevan Physics Institute, Yerevan 375036, Armenia
29Tohoku University, Sendai 980, Japan
30Princeton University, Princeton, New Jersey 08544, USA
31INFN, Sezione di Lecce, 73100 Lecce, Italy
32University of Virginia, Charlottesville, Virginia 22901, USA
33State University of New York at Stony Brook, Stony Brook, New York 11794, USA
34Norfolk State University, Norfolk, Virginia 23504, USA
35Florida State University, Tallahassee, Florida 32306, USA
36North Carolina Central University, Durham, North Carolina 27707, USA
37Harvard University, Cambridge, Massachusetts 02138, USA
Received 23 December 2003; published 28 April 2004
Exclusive electroproduction of π0 mesons on protons in the backward hemisphere has been studied at Q2=1.0 GeV2 by detecting protons in the forward direction in coincidence with scattered electrons from the 4 GeV electron beam in Jefferson Lab’s Hall A. The data span the range of the total (γ*p) center-of-mass energy W from the pion production threshold to W=2.0 GeV. The differential cross sections σT+ϵσL, σTL, and σTT were separated from the azimuthal distribution and are presented together with the MAID and SAID parametrizations.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.69.045203
DOI:
10.1103/PhysRevC.69.045203
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