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Virtual Compton Scattering and the Generalized Polarizabilities of the Proton at Q²=0.92 and 1.76 GeV²

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arxiv 1205.3387 v2 pith:IQUF25ZJ submitted 2012-05-15 nucl-ex hep-ex

Virtual Compton Scattering and the Generalized Polarizabilities of the Proton at Q²=0.92 and 1.76 GeV²

H. Fonvieille , G. Laveissiere , N. Degrande , S. Jaminion , C. Jutier , L. Todor , R. Di Salvo , L. Van Hoorebeke
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L. C. Alexa B. D. Anderson K. A. Aniol K. Arundell G. Audit L. Auerbach F. T. Baker M. Baylac J. Berthot P. Y. Bertin W. Bertozzi L. Bimbot W. U. Boeglin E. J. Brash V. Breton H. Breuer E. Burtin J. R. Calarco L. S. Cardman C. Cavata C.-C. Chang J.-P. Chen E. Chudakov E. Cisbani D. S. Dale C. W. deJager R. De Leo A. Deur N. d'Hose G. E. Dodge J. J. Domingo L. Elouadrhiri M. B. Epstein L. A. Ewell J. M. Finn K. G. Fissum G. Fournier B. Frois S. Frullani C. Furget H. Gao J. Gao F. Garibaldi A. Gasparian S. Gilad R. Gilman A. Glamazdin C. Glashausser J. Gomez V. Gorbenko P. Grenier P. A. M. Guichon J. O. Hansen R. Holmes M. Holtrop C. Howell G. M. Huber C. E. Hyde S. Incerti M. Iodice J. Jardillier M. K. Jones W. Kahl S. Kato A. T. Katramatou J. J. Kelly S. Kerhoas A. Ketikyan M. Khayat K. Kino S. Kox L. H. Kramer K. S. Kumar G. Kumbartzki M. Kuss A. Leone J. J. LeRose M. Liang R. A. Lindgren N. Liyanage G. J. Lolos R. W. Lourie R. Madey K. Maeda S. Malov D. M. Manley C. Marchand D. Marchand D. J. Margaziotis P. Markowitz J. Marroncle J. Martino K. McCormick J. McIntyre S. Mehrabyan F. Merchez Z. E. Meziani R. Michaels G. W. Miller J. Y. Mougey S. K. Nanda D. Neyret E. A. J. M. Offermann Z. Papandreou B. Pasquini C. F. Perdrisat R. Perrino G. G. Petratos S. Platchkov R. Pomatsalyuk D. L. Prout V. A. Punjabi T. Pussieux G. Quemener R. D. Ransome O. Ravel J. S. Real F. Renard Y. Roblin D. Rowntree G. Rutledge P. M. Rutt A. Saha T. Saito A. J. Sarty A. Serdarevic T. Smith G. Smirnov K. Soldi P. Sorokin P. A. Souder R. Suleiman J. A. Templon T. Terasawa R. Tieulent E. Tomasi-Gustaffson H. Tsubota H. Ueno P. E. Ulmer G. M. Urciuoli M. Vanderhaeghen R. L. J. Van der Meer R. Van De Vyver P. Vernin B. Vlahovic H. Voskanyan E. Voutier J. W. Watson L. B. Weinstein K. Wijesooriya R. Wilson B. B. Wojtsekhowski D. G. Zainea W.-M. Zhang J. Zhao Z.-L. Zhou (The Jefferson Lab Hall A Collaboration)
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classification nucl-ex hep-ex
keywords protoncomptonelectricgeneralizedmagneticpolarizabilitiesscatteringvirtual
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Virtual Compton Scattering (VCS) on the proton has been studied at Jefferson Lab using the exclusive photon electroproduction reaction (e p --> e p 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 GeV^2. 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 non-trivial behavior.

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