The first dedicated virtual compton scattering experiment at MAMI

J M Friedrich,P Bartsch,D Baumann, J Berthot,P Y Bertin,V Breton,W Boeglin, R Bohm,N Dhose, T Caprano, S Derber,N Degrande, M Ding,M O Distler,J E Ducret, R Edelhoff, I Ewald,H Fonvieille, R Geiges,Thierry Gousset,P A M Guichon, H Holvoet, C E Hydewright, P Jennewein, M Kahrau, S Kerhoas,Matthias Korn,H M Kramer,K W Krygier, V Kunde, B Lannoy, D Lhuillier, A Liesenfeld,C Marchand, D Marchand,J Martino, H Merkel, K Merle, P Merle,G De Meyer, J Mougey, R Neuhausen, E A J M Offermann,Th Pospischil,G Quemener, O Ravel,Y Roblin,J Roche,D Rohe,G Rosner, D Ryckbosch,P U Sauer, H Schmieden, S Schardt,G Tamas,M Tytgat,Marc Vanderhaeghen,L Van Hoorebeke,R Van De Vyver,J Van De Wiele,P Vernin, A Wagner,Th Walcher

Nuclear Physics A（2000）

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摘要

We measured the absolute cross sections for photon electro-production off the proton, ep --> ep gamma, with the high resolution spectrometers at MAMI at momentum transfer q = 600 MeV/c and photon polarization epsilon = 0.62. We covered the momentum range for the outgoing real photon q' = 33 divided by 111 MeV/c. From the extracted Virtual Compton Scattering amplitude we deduce values for two structure functions related to the generalized polarizabilities of the proton.

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