Compton-scattering cross section on the proton at high momentum transfer.

Published

Journal Article

Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s=5-11 and -t=2-7 GeV2 with a statistical accuracy of a few percent. The scaling power for the s dependence of the cross section at fixed center-of-mass angle was found to be 8.0+/-0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark.

Full Text

Duke Authors

Cited Authors

  • Danagoulian, A; Mamyan, VH; Roedelbronn, M; Aniol, KA; Annand, JRM; Bertin, PY; Bimbot, L; Bosted, P; Calarco, JR; Camsonne, A; Chang, CC; Chang, T-H; Chen, J-P; Choi, S; Chudakov, E; Degtyarenko, P; de Jager, CW; Deur, A; Dutta, D; Egiyan, K; Gao, H; Garibaldi, F; Gayou, O; Gilman, R; Glamazdin, A; Glashausser, C; Gomez, J; Hamilton, DJ; Hansen, J-O; Hayes, D; Higinbotham, DW; Hinton, W; Horn, T; Howell, C; Hunyady, T; Hyde, CE; Jiang, X; Jones, MK; Khandaker, M; Ketikyan, A; Kubarovsky, V; Kramer, K; Kumbartzki, G; Laveissière, G; Lerose, J; Lindgren, RA; Margaziotis, DJ; Markowitz, P; McCormick, K; Meekins, DG; Meziani, Z-E; Michaels, R; Moussiegt, P; Nanda, S; Nathan, AM; Nikolenko, DM; Nelyubin, V; Norum, BE; Paschke, K; Pentchev, L; Perdrisat, CF; Piasetzky, E; Pomatsalyuk, R; Punjabi, VA; Rachek, I; Radyushkin, A; Reitz, B; Roche, R; Ron, G; Sabatié, F; Saha, A; Savvinov, N; Shahinyan, A; Shestakov, Y; Sirca, S; Slifer, K; Solvignon, P; Stoler, P; Tajima, S; Sulkosky, V; Todor, L; Vlahovic, B; Weinstein, LB; Wang, K; Wojtsekhowski, B; Voskanyan, H; Xiang, H; Zheng, X; Zhu, L; Jefferson Lab Hall A Collaboration,

Published Date

  • April 9, 2007

Published In

Volume / Issue

  • 98 / 15

Start / End Page

  • 152001 -

PubMed ID

  • 17501338

Pubmed Central ID

  • 17501338

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.98.152001

Language

  • eng