GEpGMpratio by polarization transfer in e p →ep


Journal Article

The ratio of the proton's elastic electromagnetic form factors, GEpGMp, was obtained by measuring Ptand pl, the transverse and the longitudinal recoil proton polarization, respectively. For elastic e→p →ep→, GEpGMpis proportional to pt/pl Simultaneous measurement of pt/plin a polarimeter provides good control of the systematic uncertainty. The results for the ratio GEpGMpshow a systematic decrease as Q2increases from 0.5 to 3.5GeV2, indicating for the first time a definite difference in the spatial distribution of charge and magnetization currents in the proton. © 2000 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Jones, MK; Aniol, KA; Baker, FT; Berthot, J; Bertin, PY; Bertozzi, W; Besson, A; Bimbot, L; Boeglin, WU; Brash, EJ; Brown, D; Calarco, JR; Cardman, LS; Chang, CC; Chen, JP; Chudakov, E; Churchwell, S; Cisbani, E; Dale, DS; De Leo, R; Deur, A; Diederich, B; Domingo, JJ; Epstein, MB; Ewell, LA; Fissum, KG; Fleck, A; Fonvieille, H; Frullani, S; Gao, J; Garibaldi, F; Gasparian, A; Gerstner, G; Gilad, S; Gilman, R; Glamazdin, A; Glashausser, C; Gomez, J; Gorbenko, V; Green, A; Hansen, JO; Howell, CR; Huber, GM; Iodice, M; de Jager, CW; Jaminion, S; Jiang, X; Kahl, W; Kelly, JJ; Khayat, M; Kramer, LH; Kumbartzki, G; Kuss, M; Lakuriki, E; Lavessière, G; LeRose, JJ; Liang, M; Lindgren, RA; Liyanage, N; Lolos, GJ; Macri, R; Madey, R; Malov, S; Margaziotis, DJ; Markowitz, P; McCormick, K; McIntyre, JI; van der Meer, RLJ; Michaels, R; Milbrath, BD; Mougey, JY; Nanda, SK; Offermann, EAJM; Papandreou, Z; Perdrisat, CF; Petratos, GG; Piskunov, NM; Pomatsalyuk, RI; Prout, DL; Punjabi, V; Quéméner, G; Ransome, RD; Raue, BA; Roblin, Y; Roche, R; Rutledge, G; Rutt, PM; Saha, A; Saito, T; Sarty, AJ; Smith, TP; Sorokin, P; Strauch, S; Suleiman, R; Takahashi, K; Templon, JA; Todor, L; Ulmer, PE; Urciuoli, GM; Vernin, P

Published Date

  • January 1, 2000

Published In

Volume / Issue

  • 84 / 7

Start / End Page

  • 1398 - 1402

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/PhysRevLett.84.1398

Citation Source

  • Scopus