The target and double spin asymmetries of the exclusive pseudoscalar channel (e) over right arrow(p) over right arrow -> ep pi(0) ere measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divided into 110 four-dimensional bins of Q(2), x(B), -t and phi. Large values of asymmetry moments clearly indicate a substantial contribution to the polarized structure functions from transverse virtual photon amplitudes. The interpretation of experimental data in terms of generalized parton distributions (GPDs) provides the first insight on the chiral-odd GPDs (I) over tildeI(T) and E-T, and complement previous measurements of unpolarized structure functions sensitive to the GPDs H-T and (E) over bar (T). These data provide a crucial input for parametrizations of essentially unknown chiral-odd GPDs and will strongly influence existing theoretical calculations based on the handbag formalism.

Kim, A., Avakian, H., Burkert, V., Joo, K., Kim, W., Adhikari, K., et al. (2017). Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS. PHYSICS LETTERS. SECTION B, 768, 168-173 [10.1016/j.physletb.2017.02.032].

Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS

COLANERI, LUCA;D'ANGELO, ANNALISA;PISANO, SILVIA;RIZZO, ALESSANDRO;
2017

Abstract

The target and double spin asymmetries of the exclusive pseudoscalar channel (e) over right arrow(p) over right arrow -> ep pi(0) ere measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divided into 110 four-dimensional bins of Q(2), x(B), -t and phi. Large values of asymmetry moments clearly indicate a substantial contribution to the polarized structure functions from transverse virtual photon amplitudes. The interpretation of experimental data in terms of generalized parton distributions (GPDs) provides the first insight on the chiral-odd GPDs (I) over tildeI(T) and E-T, and complement previous measurements of unpolarized structure functions sensitive to the GPDs H-T and (E) over bar (T). These data provide a crucial input for parametrizations of essentially unknown chiral-odd GPDs and will strongly influence existing theoretical calculations based on the handbag formalism.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - Fisica Nucleare e Subnucleare
English
Con Impact Factor ISI
Nucleon structure; CLAS collaboration; Deeply Virtual Meson Production; Chiral-odd generalized parton distributions; Longitudinally polarized target
CLAS Collaboration
http://www.sciencedirect.com/science/article/pii/S037026931730134X
Kim, A., Avakian, H., Burkert, V., Joo, K., Kim, W., Adhikari, K., et al. (2017). Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS. PHYSICS LETTERS. SECTION B, 768, 168-173 [10.1016/j.physletb.2017.02.032].
Kim, A; Avakian, H; Burkert, V; Joo, K; Kim, W; Adhikari, K; Akbar, Z; Anefalos Pereira, S; Badui, R; Battaglieri, M; Batourine, V; Bedlinskiy, I; Biselli, A; Boiarinov, S; Bosted, P; Briscoe, W; Brooks, W; Bultmann, S; Cao, T; Carman, D; Celentano, A; Chandavar, S; Charles, G; Chetry, T; Colaneri, L; Cole, P; Compton, N; Contalbrigo, M; Cortes, O; Crede, V; D'Angelo, A; Dashyan, N; De Vita, R; De Sanctis, E; Djalali, C; Egiyan, H; El Alaoui, A; El Fassi, L; Eugenio, P; Fedotov, G; Fersch, R; Filippi, A; Fleming, J; Fradi, A; Garc con, M; Ghandilyan, Y; Gilfoyle, G; Giovanetti, K; Girod, F; Gohn, W; Golovatch, E; Gothe, R; Griffioen, K; Guo, L; Hafidi, K; Hanretty, C; Hattawy, M; Heddle, D; Hicks, K; Holtrop, M; Ilieva, Y; Ireland, D; Ishkhanov, B; Jenkins, D; Jiang, H; Jo, H; Joosten, S; Keller, D; Khachatryan, G; Khandaker, M; Klein, A; Klein, F; Kubarovsky, V; Kuhn, S; Kuleshov, S; Lanza, L; Lenisa, P; Lu, H; Macgregor, I; Markov, N; Mattione, P; Mccracken, M; Mckinnon, B; Mokeev, V; Movsisyan, A; Munevar, E; Nadel Turonski, P; Net, L; Niccolai, S; Osipenko, M; Ostrovidov, A; Paolone, M; Park, K; Pasyuk, E; Phelps, W; Pisano, S; Pogorelko, O; Price, J; Prok, Y; Ripani, M; Rizzo, A; Rosner, G; Rossi, P; Roy, P; Salgado, C; Schumacher, R; Seder, E; Sharabian, Y; Skorodumina, I; Smith, G; Sokhan, D; Sparveris, N; Stepanyan, S; Stoler, P; Strakovsky, I; Strauch, S; Sytnik, V; Taiuti, M; Torayev, B; Ungaro, M; Voskanyan, H; Voutier, E; Watts, D; Wei, X; Weinstein, L; Zachariou, N; Zana, L; Zhang, J
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/184957
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 10
social impact