Beam-target double-spin asymmetries and target single-spin asymmetries in exclusive pi(+) and quasiexclusive pi(-) electroproduction were obtained from scattering of 1.6- to 5.7-GeV longitudinally polarized electrons from longitudinally polarized protons (for pi(+)) and deuterons (for pi(-)) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The kinematic range covered is 1.1 < W < 2.6 GeV and 0.05 < Q(2) < 5 GeV2, with good angular coverage in the forward hemisphere. The asymmetry results were divided into approximately 40 000 kinematic bins for pi(+) from free protons and 15 000 bins for pi(-) production from bound nucleons in the deuteron. The present results are found to be in reasonable agreement with fits to previous world data for W < 1.7 GeV and Q(2) < 0.5 GeV2, with discrepancies increasing at higher values of Q(2), especially for W > 1.5 GeV. Very large target-spin asymmetries are observed for W > 1.6 GeV. When combined with cross-section measurements, the present results can provide powerful constraints on nucleon resonance amplitudes at moderate and large values of Q(2), for resonances with masses as high as 2.3 GeV.

Bosted, P., Biselli, A., Careccia, S., Dodge, G., Fersch, R., Guler, N., et al. (2016). Target and beam-target spin asymmetries in exclusive π+ and π- Electroproduction with 1.6- to 5.7-GeV electrons. PHYSICAL REVIEW C, 94(5) [10.1103/PhysRevC.94.055201].

Target and beam-target spin asymmetries in exclusive π+ and π- Electroproduction with 1.6- to 5.7-GeV electrons

COLANERI, LUCA;D'ANGELO, ANNALISA;Lanza, L;PISANO, SILVIA;RIZZO, ALESSANDRO;ZONTA, IRENE
2016-11-01

Abstract

Beam-target double-spin asymmetries and target single-spin asymmetries in exclusive pi(+) and quasiexclusive pi(-) electroproduction were obtained from scattering of 1.6- to 5.7-GeV longitudinally polarized electrons from longitudinally polarized protons (for pi(+)) and deuterons (for pi(-)) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The kinematic range covered is 1.1 < W < 2.6 GeV and 0.05 < Q(2) < 5 GeV2, with good angular coverage in the forward hemisphere. The asymmetry results were divided into approximately 40 000 kinematic bins for pi(+) from free protons and 15 000 bins for pi(-) production from bound nucleons in the deuteron. The present results are found to be in reasonable agreement with fits to previous world data for W < 1.7 GeV and Q(2) < 0.5 GeV2, with discrepancies increasing at higher values of Q(2), especially for W > 1.5 GeV. Very large target-spin asymmetries are observed for W > 1.6 GeV. When combined with cross-section measurements, the present results can provide powerful constraints on nucleon resonance amplitudes at moderate and large values of Q(2), for resonances with masses as high as 2.3 GeV.
1-nov-2016
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
CHARGED PIONS; DEUTERONS; NUCLEON; GEV2; CLAS
CLAS Collaboration
http://journals.aps.org/prc/pdf/10.1103/PhysRevC.94.055201
Bosted, P., Biselli, A., Careccia, S., Dodge, G., Fersch, R., Guler, N., et al. (2016). Target and beam-target spin asymmetries in exclusive π+ and π- Electroproduction with 1.6- to 5.7-GeV electrons. PHYSICAL REVIEW C, 94(5) [10.1103/PhysRevC.94.055201].
Bosted, P; Biselli, A; Careccia, S; Dodge, G; Fersch, R; Guler, N; Kuhn, S; Pierce, J; Prok, Y; Zheng, X; Adhikari, K; Adikaram, D; Akbar, Z; Amaryan, M; Anefalos Pereira, S; Asryan, G; Avakian, H; Badui, R; Ball, J; Baltzell, N; Battaglieri, M; Batourine, V; Bedlinskiy, I; Boiarinov, S; Briscoe, W; Bultmann, S; Burkert, V; Cao, T; Carman, D; Celentano, A; Chandavar, S; Charles, G; Chetry, T; Ciullo, G; Clark, L; Colaneri, L; Cole, P; Contalbrigo, M; Cortes, O; Crede, V; D'Angelo, A; Dashyan, N; De Vita, R; Deur, A; Djalali, C; Dupre, R; Egiyan, H; El Alaoui, A; El Fassi, L; Eugenio, P; Fanchini, E; Fedotov, G; Filippi, A; Fleming, J; Forest, T; Fradi, A; Garcon, M; Gevorgyan, N; Ghandilyan, Y; Gilfoyle, G; Giovanetti, K; Girod, F; Gleason, C; Gohn, W; Golovatch, E; Gothe, R; Griffioen, K; Guo, L; Hafidi, K; Hanretty, C; Harrison, N; Hattawy, M; Heddle, D; Hicks, K; Holtrop, M; Hughes, S; Ilieva, Y; Ireland, D; Ishkhanov, B; Isupov, E; Jenkins, D; Jiang, H; Jo, H; Joo, K; Joosten, S; Keller, D; Khandaker, M; Kim, W; Klein, A; Klein, ; Fj, K; V, ; Kuleshov, S; Lanza, L; Lenisa, P; Livingston, K; Lu, H; Macgregor, I; Markov, N; Mccracken, M; Mckinnon, B; Meyer, C; Minehart, R; Mirazita, M; Mokeev, V; Movsisyan, A; Munevar, E; Munoz Camacho, C; Nadel Turonski, P; Net, L; Ni, A; Niccolai, S; Niculescu, G; Niculescu, I; Osipenko, M; Ostrovidov, A; Paremuzyan, R; Park, K; Pasyuk, E; Peng, P; Phelps, W; Pisano, S; Pogorelko, O; Price, J; Procureur, S; Protopopescu, D; Puckett, A; Raue, B; Ripani, M; Rizzo, A; Rosner, G; Rossi, P; Roy, P; Sabatie, F; Salgado, C; Schumacher, R; Seder, E; Sharabian, Y; Simonyan, A; Skorodumina, I; Smith, G; Sparveris, N; Stankovic, I; Stepanyan, S; Strakovsky, I; Strauch, S; Sytnik, V; Taiuti, M; Tian, Y; Torayev, B; Ungaro, M; Voskanyan, H; Voutier, E; Walford, N; Watts, D; Wei, X; Weinstein, L; Wood, M; Zachariou, N; Zana, L; Zhang, J; Zhao, Z; Zonta, I
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/173663
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