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We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic 14NH3 target, and extracted double and single target spin asymmetries for ep→e′π0X in multidimensional bins in four-momentum transfer (1.0<Q2<3.2 GeV2), Bjorken-x (0.12<x<0.48), hadron energy fraction (0.4<z<0.7), transverse pion momentum (0<PT<1.0 GeV), and azimuthal angle ϕh between the lepton scattering and hadron production planes. We extracted asymmetries as a function of both x and PT, which provide access to transverse-momentum distributions of longitudinally polarized quarks. The double spin asymmetries depend weakly on PT. The sin⁡2ϕh moments are zero within uncertainties, which is consistent with the expected suppression of the Collins fragmentation function. The observed sin⁡ϕh moments suggest that quark gluon correlations are significant at large x.

Jawalkar, S., Koirala, S., Avakian, H., Bosted, P., Griffioen, K.a., Keith, C., et al. (2018). Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS. PHYSICS LETTERS. SECTION B, 782, 662-667 [10.1016/j.physletb.2018.06.014].

Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS

Colaneri, L.;D'Angelo, A.;Lanza, L.;Pisano, S.;Rizzo, A.;
2018-07-10

Abstract

We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic 14NH3 target, and extracted double and single target spin asymmetries for ep→e′π0X in multidimensional bins in four-momentum transfer (1.0
10-lug-2018
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
Collins fragmentation; Double spin asymmetries; Semi-inclusive deep-inelastic scattering; Single spin asymmetries; Transverse momentum distributions; Nuclear and High Energy Physics
CLAS Collaboration
http://www.sciencedirect.com/science/journal/03702693
Jawalkar, S., Koirala, S., Avakian, H., Bosted, P., Griffioen, K.a., Keith, C., et al. (2018). Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS. PHYSICS LETTERS. SECTION B, 782, 662-667 [10.1016/j.physletb.2018.06.014].
Jawalkar, S; Koirala, S; Avakian, H; Bosted, P; Griffioen, Ka; Keith, C; Kuhn, Se; Adhikari, Kp; Adhikari, S; Adikaram, D; Akbar, Z; Amaryan, Mj; Anefalos Pereira, S; Ball, J; Baltzell, Na; Battaglieri, M; Batourine, V; Bedlinskiy, I; Biselli, As; Boiarinov, S; Briscoe, Wj; Brock, J; Brooks, Wk; Bültmann, S; Burkert, Vd; Cao, Ft; Carlin, C; Carman, Ds; Celentano, A; Charles, G; Chetry, T; Ciullo, G; Clark, L; Colaneri, L; Cole, Pl; Contalbrigo, M; Cortes, O; Crede, V; D'Angelo, A; Dashyan, N; De Vita, R; De Sanctis, E; Defurne, M; Deur, A; Djalali, C; Ddoge, G; Dupre, R; Egiyan, H; El Alaoui, A; El Fassi, L; Elouadrhiri, L; Eugenio, P; Fedotov, G; Fegan, S; Fersch, R; Filippi, A; Fleming, Ja; Forest, Ta; Fradi, A; Garçon, M; Ghandilyan, Y; Gilfoyle, Gp; Giovanetti, Kl; Girod, Fx; Gleason, C; Gohn, W; Golovatch, E; Gothe, Rw; Guidal, M; Guler, N; Guo, L; Hakobyan, H; Hanretty, C; Harrison, N; Hattawy, M; Heddle, D; Hicks, K; Hollis, G; Holtrop, M; Hughes, Sm; Ilieva, Y; Ireland, Dg; Ishkhanov, Bs; Isupov, El; Jenkins, D; Jiang, H; Joo, K; Joosten, S; Keller, D; Khachatryan, G; Khachatryan, M; Khandaker, M; Kim, A; Kim, W; Klein, A; Klein, Fj; Kubarovsky, V; Kuleshov, Sv; Lanza, L; Lenisa, P; Livingston, K; Lu, Hy; Macgregor, Ijd; Markov, N; Mayer, M; Mccracken, Me; Mckinnon, B; Meyer, Ca; Mineeva, T; Mirazita, M; Mokeev, V; Montgomery, Ra; Movsisyan, A; Munoz Camacho, C; Nadel-Turonski, P; Net, La; Niccolai, S; Niculescu, G; Niculescu, I; Osipenko, M; Ostrovidov, Ai; Paremuzyan, R; Park, K; Pasyuk, E; Phelps, E; Phelps, W; Pierce, J; Pisano, S; Pogorelko, O; Price, Jw; Prok, Y; Protopopescu, D; Raue, Ba; Ripani, M; Riser, D; Rizzo, A; Rosner, G; Rossi, P; Sabatié, F; Salgado, C; Schumacher, Ra; Seder, E; Sharabian, Yg; Simonyan, A; Skorodumina, I; Smith, Gd; Sober, Di; Sokhan, D; Sparveris, N; Stankovic, I; Strauch, S; Taiuti, M; Ungaro, M; Voskanyan, H; Voutier, E; Walford, Nk; Watts, Dp; Wei, X; Weinstein, Lb; Wood, Mh; Zachariou, N; Zhang, J; Zhao, Zw
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/207319
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