Measurement of the generalized polarizabilities of the proton in virtual Compton scattering at Q2=0.92 and 1.76 GeV2.

Published

Journal Article

We report a virtual Compton scattering study of the proton at low c.m. energies. We have determined the structure functions P(LL)-P(TT)/epsilon and P(LT), and the electric and magnetic generalized polarizabilities (GPs) alpha(E)(Q2) and beta(M)(Q2) at momentum transfer Q(2)=0.92 and 1.76 GeV2. The electric GP shows a strong falloff with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a falloff; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from piN intermediate states.

Full Text

Duke Authors

Cited Authors

  • Laveissière, G; Todor, L; Degrande, N; Jaminion, S; Jutier, C; Di Salvo, R; Van Hoorebeke, L; Alexa, LC; Anderson, BD; Aniol, KA; Arundell, K; Audit, G; Auerbach, L; Baker, FT; Baylac, M; Berthot, J; Bertin, PY; Bertozzi, W; Bimbot, L; Boeglin, WU; Brash, EJ; Breton, V; Breuer, H; Burtin, E; Calarco, JR; Cardman, LS; Cavata, C; Chang, C-C; Chen, J-P; Chudakov, E; Cisbani, E; Dale, DS; de Jager, CW; De Leo, R; Deur, A; d'Hose, N; Dodge, GE; Domingo, JJ; Elouadrhiri, L; Epstein, MB; Ewell, LA; Finn, JM; Fissum, KG; Fonvieille, H; Fournier, G; Frois, B; Frullani, S; Furget, C; Gao, H; Gao, J; Garibaldi, F; Gasparian, A; Gilad, S; Gilman, R; Glamazdin, A; Glashausser, C; Gomez, J; Gorbenko, V; Grenier, P; Guichon, PAM; Hansen, JO; Holmes, R; Holtrop, M; Howell, C; Huber, GM; Hyde-Wright, CE; Incerti, S; Iodice, M; Jardillier, J; Jones, MK; Kahl, W; Kato, S; Katramatou, AT; Kelly, JJ; Kerhoas, S; Ketikyan, A; Khayat, M; Kino, K; Kox, S; Kramer, LH; Kumar, KS; Kumbartzki, G; Kuss, M; Leone, A; LeRose, JJ; Liang, M; Lindgren, RA; Liyanage, N; Lolos, GJ; Lourie, RW; Madey, R; Maeda, K; Malov, S; Manley, DM; Marchand, C; Marchand, D; Margaziotis, DJ; Markowitz, P; Marroncle, J; Martino, J; McCormick, K; McIntyre, J; Mehrabyan, S; Merchez, F; Meziani, ZE; Michaels, R; Miller, GW; Mougey, JY; Nanda, SK; Neyret, D; Offermann, EAJM; Papandreou, Z; Pasquini, B; Perdrisat, CF; Perrino, R; Petratos, GG; Platchkov, S; Pomatsalyuk, R; Prout, DL; Punjabi, VA; Pussieux, T; Quémenér, G; Ransome, RD; Ravel, O; Real, JS; Renard, F; Roblin, Y; Rowntree, D; Rutledge, G; Rutt, PM; Saha, A; Saito, T; Sarty, AJ; Serdarevic, A; Smith, T; Smirnov, G; Soldi, K; Sorokin, P; Souder, PA; Suleiman, R; Templon, JA; Terasawa, T; Tieulent, R; Tomasi-Gustaffson, E; Tsubota, H; Ueno, H; Ulmer, PE; Urciuoli, GM; Vanderhaeghen, M; Van De Vyver, R; Van der Meer, RLJ; Vernin, P; Vlahovic, B; Voskanyan, H; Voutier, E; Watson, JW; Weinstein, LB; Wijesooriya, K; Wilson, R; Wojtsekhowski, BB; Zainea, DG; Zhang, W-M; Zhao, J; Zhou, Z-L; Jefferson Lab Hall A Collaboration,

Published Date

  • September 14, 2004

Published In

Volume / Issue

  • 93 / 12

Start / End Page

  • 122001 -

PubMed ID

  • 15447252

Pubmed Central ID

  • 15447252

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.93.122001

Language

  • eng