Measurement of deeply virtual compton scattering with a polarized-proton target

Chen, S. et al. (2006) Measurement of deeply virtual compton scattering with a polarized-proton target. Physical Review Letters, 97(7), 072002. (doi: 10.1103/PhysRevLett.97.072002)

Abstract

The longitudinal target-spin asymmetry AUL for the exclusive electroproduction of high-energy photons was measured for the first time in ep⃗ →e′pγ. The data have been accumulated at JLab with the CLAS spectrometer using 5.7 GeV electrons and a longitudinally polarized NH₃ target. A significant azimuthal angular dependence was observed, resulting from the interference of the deeply virtual Compton scattering and Bethe-Heitler processes. The amplitude of the sinϕmoment is 0.252±0.042^stat±0.020^sys. Theoretical calculations are in good agreement with the magnitude and the kinematic dependence of the target-spin asymmetry, which is sensitive to the generalized parton distributions H˜ and H.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: McKinnon, Dr Bryan and Livingston, Dr Kenneth and Watts, Dr Daniel and Protopopescu, Dr Dan and Ireland, Professor David and Kellie, Dr James and Rosner, Professor Guenther
• Authors: Chen, S., Avakian, H., Burkert, V., Eugenio, P., Adams, G., Amarian, M., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Bagdasaryan, H., Baillie, N., Ball, J., Baltzell, N., Barrow, S., Batourine, V., Battaglieri, M., Beard, K., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B., Biselli, A., Bonner, B., Bouchigny, S., Boiarinov, S., Bosted, P., Bradford, R., Branford, D., Briscoe, W., Brooks, W., Bultmann, S., Butuceanu, C., Calarco, J., Careccia, S., Carman, D., Carnahan, B., Cazes, A., Cole, P., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Crede, V., Cummings, J., De Masi, R., DeVita, R., De Sanctis, E., Degtyarenko, P., Denizli, H., Dennis, L., Deur, A., Dharmawardane, K., Dhuga, K., Djalali, C., Dodge, G., Donnelly, J., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O., Egiyan, H., Egiyan, K., El Fassi, L., Elouadrhiri, L., Fatemi, R., Fedotov, G., Feldman, G., Feuerbach, R., Forest, T., Funsten, H., Garcon, M., Gavalian, G., Gilfoyle, G., Giovanetti, K., Girod, F., Goetz, J., Golovatch, E., Gonenc, A., Gothe, R., Griffioen, K., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hakobyan, R., Hardie, J., Heddle, D., Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., Huertas, M., Hyde-Wright, C., Ilieva, Y., Ireland, D., Ishkhanov, B., Isupov, E., Ito, M., Jenkins, D., Jo, H., Joo, K., Juengst, H., Keith, C., Kellie, J., Khandaker, M., Kim, K., Kim, K., Kim, W., Klein, A., Klein, F., Klusman, M., Kossov, M., Kramer, L., Kubarovsky, V., Kuhn, J., Kuhn, S., Kuleshov, S., Lachniet, J., Laget, J., Langheinrich, J., Lawrence, D., Li, J., Lima, A., Livingston, K., Lu, H., Lukashin, K., MacCormick, M., Markov, N., McAleer, S., McKinnon, B., McNabb, J., Mecking, B., Mestayer, M., Meyer, C., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Morrow, S., Moteabbed, M., Mueller, J., Mutchler, G., Nadel-Turonski, P., Napolitano, J., Nasseripour, R., Natasha, N., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B., Niroula, M., Niyazov, R., Nozar, M., ORielly, G., Osipenko, M., Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Philips, S., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Popa, I., Pozdniakov, S., Preedom, B., Price, J., Prok, Y., Protopopescu, D., Qin, L., Raue, B., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., Rowntree, D., Rubin, P., Sabatie, F., Salgado, C., Santoro, J., Sapunenko, V., Schumacher, R., Serov, V., Sharabian, Y., Shaw, J., Shvedunov, N., Skabelin, A., Smith, E., Smith, L., Sober, D., Stavinsky, A., Stepanyan, S., Stepanyan, S., Stokes, B., Stoler, P., Strakovsky, I., Strauch, S., Suleiman, R., Taiuti, M., Tedeschi, D., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vanderhaeghen, M., Vineyard, M., Vlassov, A., Watts, D., Weinstein, L., Weygand, D., Williams, M., Wolin, E., Wood, M., Yegneswaran, A., Yun, J., Zana, L., Zhang, J., Zhao, B., Zhao, Z., and CLAS Collaboration,
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review Letters
• Journal Abbr.: Phys. Rev. Lett.
• Publisher: American Physical Society
• ISSN: 0031-9007
• ISSN (Online): 1079-7114
• Published Online: 18 August 2006