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

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, st...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2007-04, Vol.98 (15), p.152001-152001, Article 152001
Main Authors: Danagoulian, A, Mamyan, V H, Roedelbronn, M, Aniol, K A, Annand, J R M, Bertin, P Y, Bimbot, L, Bosted, P, Calarco, J R, Camsonne, A, Chang, C C, Chang, T-H, Chen, J-P, Choi, Seonho, Chudakov, E, Degtyarenko, P, de Jager, C W, Deur, A, Dutta, D, Egiyan, K, Gao, H, Garibaldi, F, Gayou, O, Gilman, R, Glamazdin, A, Glashausser, C, Gomez, J, Hamilton, D J, Hansen, J-O, Hayes, D, Higinbotham, D W, Hinton, W, Horn, T, Howell, C, Hunyady, T, Hyde, C E, Jiang, X, Jones, M K, Khandaker, M, Ketikyan, A, Kubarovsky, V, Kramer, K, Kumbartzki, G, Laveissière, G, Lerose, J, Lindgren, R A, Margaziotis, D J, Markowitz, P, McCormick, K, Meekins, D G, Meziani, Z-E, Michaels, R, Moussiegt, P, Nanda, S, Nathan, A M, Nikolenko, D M, Nelyubin, V, Norum, B E, Paschke, K, Pentchev, L, Perdrisat, C F, Piasetzky, E, Pomatsalyuk, R, Punjabi, V A, 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, L B, Wang, K, Wojtsekhowski, B, Voskanyan, H, Xiang, H, Zheng, X, Zhu, L
Format: Article
Language:English
Subjects:
CENTER-OF-MASS SYSTEM
COMPTON EFFECT
CROSS SECTIONS
High Energy Physics - Experiment
MOMENTUM TRANSFER
Nuclear Experiment
PERTURBATION THEORY
PHOTONS
Physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTONS
QUANTUM CHROMODYNAMICS
QUARKS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.98.152001