Journal article
Authors list: Kim, A.; Diehl, S.; Joo, K.; Kubarovsky, V.; Achenbach, P.; Akbar, Z.; Alvarado, J. S.; Armstrong, Whitney R.; Atac, H.; Avakian, H.; Gayoso, C. Ayerbe; Barion, L.; Battaglieri, M.; Bedlinskiy, I.; Benkel, B.; Bianconi, A.; Biselli, A. S.; Bondi, M.; Bossu, F.; Boiarinov, S.; Brinkmann, K. T.; Briscoe, W. J.; Brooks, W. K.; Bueltmann, S.; Burkert, V. D.; Capobianco, R.; Carman, D. S.; Carvajal, J. C.; Celentano, A.; Charles, G.; Chatagnon, P.; Chesnokov, V.; Chetry, T.; Ciullo, G.; Clary, B.; Clash, G.; Cole, P. L.; Contalbrigo, M.; Costantini, G.; Crede, V.; D'Angelo, A.; Dashyan, N.; De Vita, R.; Defurne, M.; Deur, A.; Dilks, C.; Djalali, C.; Dupre, R.; Egiyan, H.; Ehrhart, M.; El Alaoui, A.; Girod, F. X.; Glazier, D. I.; Filippi, A.; Fogler, C.; Gavalian, G.; Gilfoyle, G. P.; Gosta, G.; Girod, F. X.; Glazier, D. I.; Golubenko, A. A.; Gothe, R. W.; Guo, L.; Hafidi, K.; Hakobyan, H.; Hattawy, M.; Hauenstein, F.; Hayward, T. B.; Heddle, D.; Hobart, A.; Holtrop, M.; Hung, Yu-Chun; Ilieva, Y.; Ireland, D. G.; Isupov, E.; Jo, H. S.; Johnston, R.; Joosten, S.; Khachatryan, M.; Khanal, A.; Kim, W.; Klimenko, V.; Kripko, A.; Kuhn, S. E.; Lanza, L.; Leali, M.; Kabir, M. L.; Lee, S.; Lenisa, P.; Li, X.; MacGregor, I. . J. D.; Marchand, D.; Mascagna, V.; McKinnon, B.; Matamoros, D.; Migliorati, S.; Mineeva, T.; Mirazita, M.; Mokeev, V.; Moran, P.; Camacho, C. Munoz; Naidoo, P.; Neupane, K.; Nguyen, D.; Niccolai, S.; Niculescu, G.; Osipenko, M.; Ouillon, M.; Pandey, P.; Paolone, M.; Pappalardo, L. L.; Paremuzyan, R.; Pasyuk, E.; Paul, S. J.; Phelps, W.; Pilleux, N.; Pokhrel, M.; Poudel, J.; Price, J. W.; Prok, Y.; Radic, A.; Ramasubramanian, N.; Reed, Trevor; Richards, J.; Ripani, M.; Ritman, J.; Rossi, P.; Sabatie, F.; Salgado, C.; Schadmand, S.; Schmidt, A.; Sharabian, Y. G.; Shirokov, E. V.; Shrestha, U.; Sokhan, D.; Sparveris, N.; Spreafico, M.; Stepanyan, S.; Strakovsky, I. I.; Strauch, S.; Tan, J.; Trotta, N.; Tyson, R.; Ungaro, M.; Vallarino, S.; Venturelli, L.; Voskanyan, H.; Voutier, E.; Watts, D. P.; Wei, X.; Wishart, R.; Wood, M. H.; Yurov, M.; Zachariou, N.; Zhang, J.; Ziegler, V.; Zurek, M.
Publication year: 2024
Journal: Physics Letters B
Volume number: 849
ISSN: 0370-2693
eISSN: 1873-2445
DOI Link: https://doi.org/10.1016/j.physletb.2024.138459
Publisher: Elsevier
Abstract:
The new experimental measurements of beam spin asymmetry were performed for the deeply virtual exclusive pi(0) production in a wide kinematic region with the photon virtualities Q(2) up to 6.6 GeV2 and the Bjorken scaling variable x(B) in the valence regime. The data were collected by the CEBAF Large Acceptance Spectrometer (CLAS12) at Jefferson Lab with longitudinally polarized 10.6 GeV electrons scattered on an unpolarized liquid-hydrogen target. Sizable asymmetry values indicate a substantial contribution from transverse virtual photon amplitudes to the polarized structure functions. The interpretation of these measurements in terms of the Generalized Parton Distributions (GPDs) demonstrates their sensitivity to the chiral-odd GPD (E) over bar (T), which contains information on quark transverse spin densities in unpolarized and polarized nucleons and provides access to the nucleon's transverse anomalous magnetic moment. Additionally, the data were compared to a theoretical model based on a Regge formalism that was extended to the high photon virtualities.
Citation Styles
Harvard Citation style: Kim, A., Diehl, S., Joo, K., Kubarovsky, V., Achenbach, P., Akbar, Z., et al. (2024) Beam spin asymmetry measurements of deeply virtual π0 production with CLAS12, Physics Letters B, 849, Article 138459. https://doi.org/10.1016/j.physletb.2024.138459
APA Citation style: Kim, A., Diehl, S., Joo, K., Kubarovsky, V., Achenbach, P., Akbar, Z., Alvarado, J., Armstrong, W., Atac, H., Avakian, H., Gayoso, C., Barion, L., Battaglieri, M., Bedlinskiy, I., Benkel, B., Bianconi, A., Biselli, A., Bondi, M., Bossu, F., ...Zurek, M. (2024). Beam spin asymmetry measurements of deeply virtual π0 production with CLAS12. Physics Letters B. 849, Article 138459. https://doi.org/10.1016/j.physletb.2024.138459
Keywords
HARD EXCLUSIVE ELECTROPRODUCTION; LEADING ORDER CORRECTIONS; MESONS; TRANSVERSITY
