Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target

Pisano, S. et al. (2015) Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target. Physical Review D, 91, 052014. (doi: 10.1103/PhysRevD.91.052014)

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Single-beam, single-target, and double spin asymmetries for hard exclusive electroproduction of a photon on the proton ep→e'p'γ are presented. The data were taken at Jefferson Lab using the CEBAF large acceptance spectrometer and a longitudinally polarized 14NH3 target. The three asymmetries were measured in 165 four-dimensional kinematic bins, covering the widest kinematic range ever explored simultaneously for beam and target-polarization observables in the valence quark region. The kinematic dependences of the obtained asymmetries are discussed and compared to the predictions of models of generalized parton distributions. The measurement of three DVCS spin observables at the same kinematic points allows a quasi-model-independent extraction of the imaginary parts of the H and ~H Compton form factors, which give insight into the electric and axial charge distributions of valence quarks in the proton.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Sokhan, Dr Daria and McKinnon, Dr Bryan and Ireland, Professor David and Livingston, Dr Kenneth and MacGregor, Professor Douglas and Fegan, Mr Stuart and Montgomery, Dr Rachel and Rosner, Professor Guenther
Authors: Pisano, S., Biselli, A., Niccolai, S., Seder, E., Guidal, M., Mirazita, M., Adhikari, K. P., Adikaram, D., Amaryan, M. J., Anderson, M. D., Anefalos Pereira, S., Avakian, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bosted, P., Briscoe, B., Brock, J., Brooks, W. K., Burkert, V. D., Carlin, C., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., Crabb, D. G., Crede, V., D’Angelo, A., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Fersch, R., Filippi, A., Fleming, J. A., Fradi, A., Garillon, B., Garçon, M., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guo, L., Hafidi, K., Hanretty, C., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Jenkins, D., Jiang, X., Jo, H. S., Joo, K., Joosten, S., Keith, C. D., Keller, D., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Lenisa, P., Livingston, K., Lu, H. Y., MacCormick, M., MacGregor, I. J. D., Mayer, M., McKinnon, B., Meekins, D. G., Meyer, C. A., Mokeev, V., Montgomery, R. A., Moody, C. I., Munoz Camacho, C., Nadel-Turonski, P., Osipenko, M., Ostrovidov, A. I., Park, K., Phelps, W., Phillips, J. J., Pogorelko, O., Price, J. W., Procureur, S., Prok, Y., Puckett, A. J. R., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schott, D., Schumacher, R. A., Skorodumina, I., Smith, G. D., Sober, D. I., Sokhan, D., Sparveris, N., Stepanyan, S., Stoler, P., Strauch, S., Sytnik, V., Tian, Y., Tkachenko, S., Turisini, M., Ungaro, M., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., Zhao, Z. W., and Zonta, I.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Journal Abbr.:PRD
Publisher:American Physical Society
ISSN (Online):1550-2368

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