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Virtual Compton scattering and the generalized polarizabilities of the proton at Q(2)=0.92 and 1.76 GeV2
Fonvieille, H. Laveissiere, G. Jaminion, S. Arundell, K. Finn, J. M. Jones, M. K. Perdrisat, C. F. Quemener, G. Rutledge, G. Wijesooriya, K.
Fonvieille, H.
Laveissiere, G.
Jaminion, S.
Arundell, K.
Finn, J. M.
Jones, M. K.
Perdrisat, C. F.
Quemener, G.
Rutledge, G.
Wijesooriya, K.
Abstract
Virtual Compton scattering (VCS) on the proton has been studied at the Jefferson Laboratory using the exclusive photon electroproduction reaction ep -> ep gamma. This paper gives a detailed account of the analysis which has led to the determination of the structure functions P-LL - P-TT/epsilon and P-LT and the electric and magnetic generalized polarizabilities (GPs) alpha(E) (Q(2)) and beta(M) (Q(2)) at values of the four-momentum transfer squared Q(2) = 0.92 and 1.76 GeV2. These data, together with the results of VCS experiments at lower momenta, help building a coherent picture of the electric and magnetic GPs of the proton over the full measured Q(2) range and point to their nontrivial behavior.
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2012-01-01
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Physics
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https://doi.org/10.1103/PhysRevC.86.015210