Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2>1GeV2 . I. ep→eπ+n
- Bosted, P. E.
- Amaryan, M. J.
- Anefalos Pereira, S.
- Avakian, H.
- Badui, R. A.
- Ball, J.
- Baltzell, N. A.
- Battaglieri, M.
- Batourine, V.
- Bedlinskiy, I.
- Biselli, A. S.
- Briscoe, W. J.
- Bültmann, S.
- Burkert, V. D.
- Carman, D. S.
- Celentano, A.
- Chandavar, S.
- Charles, G.
- Ciullo, G.
- Clark, L.
- Colaneri, L.
- Cole, P. L.
- Contalbrigo, M.
- Crede, V.
- D'Angelo, A.
- De Vita, R.
- Deur, A.
- De Sanctis, E.
- Djalali, C.
- Dupre, R.
- Egiyan, H.
- El Alaoui, A.
- El Fassi, L.
- Elouadrhiri, L.
- Eugenio, P.
- Fanchini, E.
- Fedotov, G.
- Filippi, A.
- Fleming, J. A.
- Forest, T.
- Fradi, A.
- Gevorgyan, N.
- Ghandilyan, Y.
- Gilfoyle, G. P.
- Girod, F. X.
- Gleason, C.
- Gohn, W.
- Golovatch, E.
- Gothe, R. W.
- Griffioen, K. A.
- Guidal, M.
- Hakobyan, H.
- Hattawy, M.
- Hicks, K.
- Holtrop, M.
- Hughes, S. M.
- Ilieva, Y.
- Ireland, D. G.
- Ishkhanov, B. S.
- Isupov, E. L.
- Jiang, H.
- Jo, H. S.
- Joo, K.
- Joosten, S.
- Khachatryan, G.
- Khandaker, M.
- Kim, A.
- Kim, W.
- Klein, F. J.
- Koirala, S.
- Kubarovsky, V.
- Kuhn, S. E.
- Lanza, L.
- Net, L. A.
- Lenisa, P.
- Livingston, K.
- MacGregor, I. J. D.
- McCracken, M. E.
- McKinnon, B.
- Meyer, C. A.
- Mirazita, M.
- Mokeev, V. I.
- Montgomery, R. A.
- Munevar, E.
- Munoz Camacho, C.
- Murdoch, G.
- Nadel-Turonski, P.
- Niccolai, S.
- Osipenko, M.
- Ostrovidov, A. I.
- Park, K.
- Pasyuk, E.
- Peng, P.
- Phelps, W.
- Pisano, S.
- Pogorelko, O.
- Price, J. W.
- Prok, Y.
- Protopopescu, D.
- Puckett, A. J. R.
- Raue, B. A.
- Ripani, M.
- Rosner, G.
- Rossi, P.
- Schumacher, R. A.
- Seder, E.
- Skorodumina, Iu.
- Smith, G. D.
- Sokhan, D.
- Sparveris, N.
- Stankovic, I.
- Stepanyan, S.
- Strakovsky, I. I.
- Strauch, S.
- Taiuti, M.
- Tian, Ye
- Torayev, B.
- Ungaro, M.
- Voskanyan, H.
- Voutier, E.
- Walford, N. K.
- Wei, X.
- Weinstein, L. B.
- Zachariou, N.
- Zhang, J.
- Zhao, Z. W.
- Zonta, I.
DOIAbstract
Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive π + electroproduction reaction γ ∗ p → n π + . The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic range covered is 1.1 < W < 3 GeV and 1 < Q 2 < 6 GeV 2 . Results were obtained for about 6000 bins in W , Q 2 , cos ( θ ∗ ) , and ϕ ∗ . Except at forward angles, very large target-spin asymmetries are observed over the entire W region. Reasonable agreement is found with phenomenological fits to previous data for W <...
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