Compton Scattering Cross Section on the Proton at High Momentum Transfer

Abstract : 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.
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http://hal.in2p3.fr/in2p3-00141881
Contributor : Jeanine Pellet <>
Submitted on : Monday, April 16, 2007 - 6:07:38 PM
Last modification on : Tuesday, May 22, 2018 - 9:48:05 PM

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A. Danagoulian, V. H. Mamyan, M. Roedelbronn, K. A. Aniol, J. R. M. Annand, et al.. Compton Scattering Cross Section on the Proton at High Momentum Transfer. Physical Review Letters, American Physical Society, 2007, 98, pp.152001. ⟨10.1103/PhysRevLett.98.152001⟩. ⟨in2p3-00141881⟩

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