Beam-charge azimuthal asymmetry and deeply virtual Compton scattering

A. Airapetian, N. Akopov, Z. Akopov, M. Amarian, A. Andrus, E. C. Aschenauer, W. Augustyniak, R. Avakian, A. Avetissian, E. Avetissian, P. Bailey, D. Balin, M. Beckmann, S. Belostotski, N. Bianchi, H. P. Blok, H. Böttcher, A. Borissov, A. Borysenko, M. BouwhuisA. Brüll, V. Bryzgalov, M. Capiluppi, G. P. Capitani, T. Chen, G. Ciullo, M. Contalbrigo, P. F. Dalpiaz, W. Deconinck, R. De Leo, M. Demey, L. De Nardo, E. De Sanctis, E. Devitsin, P. Di Nezza, J. Dreschler, M. Düren, M. Ehrenfried, A. Elalaoui-Moulay, G. Elbakian, F. Ellinghaus, U. Elschenbroich, R. Fabbri, A. Fantoni, L. Felawka, S. Frullani, A. Funel, G. Gapienko, V. Gapienko, F. Garibaldi, K. Garrow, D. Gaskell, G. Gavrilov, V. Gharibyan, O. Grebeniouk, I. M. Gregor, C. Hadjidakis, K. Hafidi, M. Hartig, D. Hasch, W. H.A. Hesselink, A. Hillenbrand, M. Hoek, Y. Holler, B. Hommez, I. Hristova, G. Iarygin, A. Ivanilov, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, E. Kinney, A. Kisselev, T. Kobayashi, M. Kopytin, V. Korotkov, V. Kozlov, B. Krauss, V. G. Krivokhijine, L. Lagamba, L. Lapikás, A. Laziev, P. Lenisa, P. Liebing, L. A. Linden-Levy, W. Lorenzon, H. Lu, J. Lu, S. Lu, B. Q. Ma, B. Maiheu, N. C.R. Makins, Y. Mao, B. Marianski, H. Marukyan, F. Masoli, V. Mexner, N. Meyners, T. Michler, O. Mikloukho, C. A. Miller, Y. Miyachi, V. Muccifora, M. Murray, A. Nagaitsev, E. Nappi, Y. Naryshkin, M. Negodaev, W. D. Nowak, K. Oganessyan, H. Ohsuga, A. Osborne, N. Pickert, D. H. Potterveld, M. Raithel, D. Reggiani, P. E. Reimer, A. Reischl, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, L. Rubacek, J. Rubin, D. Ryckbosch, Y. Salomatin, I. Sanjiev, I. Savin, A. Schäfer, G. Schnell, K. P. Schüler, J. Seele, R. Seidl, B. Seitz, R. Shanidze, C. Shearer, T. A. Shibata, V. Shutov, K. Sinram, W. Sommer, M. Stancari, M. Statera, E. Steffens, J. J.M. Steijger, H. Stenzel, J. Stewart, F. Stinzing, P. Tait, H. Tanaka, S. Taroian, B. Tchuiko, A. Terkulov, A. Trzcinski, M. Tytgat, A. Vandenbroucke, P. B. Van Der Nat, G. Van Der Steenhoven, Y. Van Haarlem, V. Vikhrov, M. G. Vincter, C. Vogel, J. Volmer, S. Wang, J. Wendland, Y. Ye, Z. Ye, S. Yen, B. Zihlmann, P. Zupranski

Research output: Contribution to journalArticle

Abstract

The first observation of an azimuthal cross section asymmetry with respect to the charge of the incoming lepton beam is reported from a study of hard exclusive electroproduction of real photons. The data have been accumulated by the HERMES experiment at DESY, in which the HERA 27.6 GeV electron or positron beam scattered off an unpolarized hydrogen gas target. The observed asymmetry is attributed to the interference between the Bethe-Heitler process and the deeply virtual Compton scattering (DVCS) process. The interference term is sensitive to DVCS amplitudes, which provide the most direct access to generalized parton distributions.

Original languageEnglish (US)
Article number011103
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume75
Issue number1
DOIs
StatePublished - 2007

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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  • Cite this

    Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Andrus, A., Aschenauer, E. C., Augustyniak, W., Avakian, R., Avetissian, A., Avetissian, E., Bailey, P., Balin, D., Beckmann, M., Belostotski, S., Bianchi, N., Blok, H. P., Böttcher, H., Borissov, A., Borysenko, A., ... Zupranski, P. (2007). Beam-charge azimuthal asymmetry and deeply virtual Compton scattering. Physical Review D - Particles, Fields, Gravitation and Cosmology, 75(1), [011103]. https://doi.org/10.1103/PhysRevD.75.011103