Backward Electroproduction Ofπ0mesons on Protons in the Region of Nucleon Resonances at Four Momentum Transfer Squaredq2=1.0<…

G. Laveissière,N. Degrande,S. Jaminion, C. Jutier,L. Todor,R. Di Salvo,Luc Van Hoorebeke,L. C. Alexa,B. D. Anderson,K. Aniol,K. Arundell,G. Audit,L. B. Auerbach,F. T. Baker,M. Baylac,J. Berthot,P.Y. Bertin,W. Bertozzi,L. Bimbot, W. Boeglin,E. J. Brash,Vincent Breton,H. Breuer,E. Burtin,J. R. Calarco,L. S. Cardman,C. Cavata, C. C. Chang, J. P. Chen,E. Chudakov,E. Cisbani,D. Dale,C. W. de Jager,Р. Де Лео,A. Deur,N. d’Hose, G. E. Dodge,J. Domingo,L. Elouadrhiri,M. B. Epstein,L. Ewell,John M. Finn,K. Fissum,H. Fonvieille,G. Fournier,B. Frois,S. Frullani,Christophe Furget,Gao H, J. Gao,F. Garibaldi,A. Gasparian,S. Gilad,R. Gilman,A. Glamazdin,C. Glashausser,J. Gómez,V. Gorbenko, P. Grenier,P.A.M. Guichon,J.O. Hansen,R. Holmes,M. Holtrop,C.R. Howell,G. M. Huber,C. E. Hyde-Wright,S. Incerti,Mauro Iodice,J. Jardillier,M. Jones,W. Kahl,S. S. Kamalov,S. Kato,A. T. Katramatou,J. J. Kelly,S. Kerhoas,A. Ketikyan,M. Khayat,K. Kino,S. Kox,L. H. Kramer,Krishna Kumar,G. Kumbartzki,M. Kuss,A. Leone, J. LeRose,M. Liang,R. Lindgren, N. Liyanage,G. J. Lolos,R. W. Lourie,R. Madey,K. Maeda,S. Malov,D. Mark Manley,C. Marchand,D. Marchand,D. J. Margaziotis,P. Markowitz,J. Marroncle,J. Martino,K. McCormick,Justin I. McIntyre,S. Mehrabyan,F. Merchez,Z.-E. Meziani,R. Michaels,G. W. Miller,J. Mougey,S. Nanda,D. Neyret,E.A.J.M. Offermann,Z. Papandreou,C. F. Perdrisat,R. Perrino,G. G. Petratos,S. Platchkov,R. Pomatsalyuk,D. L. Prout,V. Punjabi,T. Pussieux,Gilles Quéméner,R. D. Ransome,O. Ravel,J. S. Réal,F. Renard,Y. Roblin,D. Rowntree,G. Rutledge,P. M. Rutt, A. Saha,T. Saito,A. Sarty,A. Serdarević,T. Smith,G.I. Smirnov,K. Soldi,P.V. Sorokin,P. A. Souder,R. Suleiman,J. A. Templon,T. Terasawa,L. Tiator,Raphael Noel Tieulent,E. Tomasi-Gustaffson,H. Tsubota,Hiroaki Ueno,P. E. Ulmer,G. M. Urciuoli,R. Van de Vyver,R. L. J. van der Meer,P. Vernin,Branislav Vlahović,H. Voskanyan,E. Voutier,J. W. Watson,Larry Weinstein,K. Wijesooriya,Richard Wilson,B. Wojtsekhowski,D. G. Zainea,W. M. Zhang,J. Zhao,Zhengfang Zhou

Physical review C Nuclear physics/Physical review C, Nuclear physics（2004）

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摘要

Exclusive electroproduction of pi0 mesons on protons in the backward hemisphere has been studied at Q**2 = 1.0 GeV**2 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 (gamma* p) center-of-mass energy W from the pion production threshold to W = 2.0 GeV. The differential cross sections sigma_T+epsilon*sigma_L, sigma_TL, and sigma_TT were separated from the azimuthal distribution and are presented together with the MAID and SAID parametrizations.

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