Compton Scattering Cross Section on the Proton at High Momentum Transfer

Journal Article · Mon Jan 29 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.98.152001· OSTI ID:898159

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-Wright, C E; Jiang, X; Jones, M K; Khandaker, M; Ketikyan, A; Koubarovski, V; Kramer, K; Kumbartzki, G; Laveissiere, G; LeRose, J; Lindgren, R A; Margaziotis, D J; Markowitz, P; McCormick, K; 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; Sabatie, 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

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 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.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 898159
• Report Number(s): JLAB-PHY-07-613; DOE/ER/40150-4216; TRN: US0700615
• Journal Information: Physical Review Letters, Vol. 98
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
COMPTON EFFECT
CROSS SECTIONS
FORECASTING
MOMENTUM TRANSFER
PHOTONS
PROTONS
QUANTUM CHROMODYNAMICS