Target and double spin asymmetries of deeply virtual π 0 production with a longitudinally polarized proton target and CLAS

Kim, A. et al. (2017) Target and double spin asymmetries of deeply virtual π 0 production with a longitudinally polarized proton target and CLAS. Physics Letters B, 768, pp. 168-173. (doi: 10.1016/j.physletb.2017.02.032)

Abstract

The target and double spin asymmetries of the exclusive pseudoscalar channel View the MathML source were 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 Q2, xB, −t and ϕ . 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 View the MathML source and ET, and complement previous measurements of unpolarized structure functions sensitive to the GPDs HT and View the MathML source. 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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sokhan, Dr Daria and McKinnon, Dr Bryan and Ireland, Professor David and MacGregor, Professor Douglas and Rosner, Professor Guenther
• Authors: Kim, A., Avakian, H., Burkert, V., Joo, K., Kim, W., Adhikari, K.P., Akbar, Z., Anefalos Pereira, S., Badui, R.A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A.S., Boiarinov, S., Bosted, P., Briscoe, W.J., Brooks, W.K., Bültmann, S., Cao, T., Carman, D.S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Colaneri, L., Cole, P.L., 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.A., Fradi, A., Garc con, M., Ghandilyan, Y., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Gohn, W., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guo, L., Hafidi, K., Hanretty, C., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Jenkins, D., Jiang, H., Jo, H.S., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Klein, A., Klein, F.J., Kubarovsky, V., Kuhn, S.E., Kuleshov, S.V., Lanza, L., Lenisa, P., Lu, H.Y., MacGregor, I.J.D., Markov, N., Mattione, P., McCracken, M.E., McKinnon, B., Mokeev, V., Movsisyan, A., Munevar, E., Nadel-Turonski, P., Net, L.A., Niccolai, S., Osipenko, M., Ostrovidov, A.I., Paolone, M., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J.W., Prok, Y., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Salgado, C., Schumacher, R.A., Seder, E., Sharabian, Y.G., Skorodumina, I., Smith, G.D., Sokhan, D., Sparveris, N., Stepanyan, S., Stoler, P., Strakovsky, I.I., Strauch, S., Sytnik, V., Taiuti, M., Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Watts, D.P., Wei, X., Weinstein, L.B., Zachariou, N., Zana, L., and Zhang, J.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physics Letters B
• Publisher: Elsevier
• ISSN: 0370-2693
• ISSN (Online): 1873-2445
• Published Online: 22 February 2017
• Copyright Holders: Copyright © 2017 The Authors
• First Published: First published in Physics Letters B 768:168-173
• Publisher Policy: Reproduced under a Creative Commons License