Virtual Compton scattering and neutral pion electroproduction in the resonance region up to the deep inelastic region at backward angles

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

Author(s)

Zhou, Z. -L.; Zhao, J.; Suleiman, R.; Rowntree, D.; Liyanage, N.; ... Show more

DownloadLaveissiere-2009-Virtual Compton scat.pdf (572.9Kb)

PUBLISHER_POLICY

Terms of use

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Metadata

Show full item record

Abstract

We have made the first measurements of the virtual Compton scattering (VCS) process via the H(e, e'p)γ exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the W-dependence at fixed Q[superscript 2] =1 GeV[superscript 2] and for the Q[superscript 2] dependence at fixed W near 1.5 GeV. The VCS data show resonant structures in the first and second resonance regions. The observed Q[superscript 2] dependence is smooth. The measured ratio of H(e, e'p)γ to H(e, e'p)π0 cross sections emphasizes the different sensitivity of these two reactions to the various nucleon resonances. Finally, when compared to real Compton scattering (RCS) at high energy and large angles, our VCS data at the highest W (1.8-1.9 GeV) show a striking Q[superscript 2] independence, which may suggest a transition to a perturbative scattering mechanism at the quark level.

Date issued

2009-01

URI

http://hdl.handle.net/1721.1/51779

Department

Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

Physical Review C

Publisher

American Physical Society

Citation

Jefferson Lab Hall A Collaboration et al. “Virtual Compton scattering and neutral pion electroproduction in the resonance region up to the deep inelastic region at backward angles.” Physical Review C 79.1 (2009): 015201. © 2009 The American Physical Society.

Version: Final published version

ISSN

0556-2813

Collections

MIT Open Access Articles

DSpace@MIT