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Nuclear-mass dependence of azimuthal beam-helicity and beam-charge asymmetries in deeply virtual Compton scattering

  • A. Airapetian
  • , N. Akopov
  • , Z. Akopov
  • , M. Amarian
  • , E. C. Aschenauer
  • , W. Augustyniak
  • , R. Avakian
  • , A. Avetissian
  • , E. Avetisyan
  • , B. Ball
  • , S. Belostotski
  • , N. Bianchi
  • , H. P. Blok
  • , H. Böttcher
  • , A. Borissov
  • , J. Bowles
  • , V. Bryzgalov
  • , J. Burns
  • , M. Capiluppi
  • , G. P. Capitani
  • E. Cisbani, G. Ciullo, M. Contalbrigo, P. F. Dalpiaz, W. Deconinck, R. De Leo, L. De Nardo, E. De Sanctis, M. Diefenthaler, P. Di Nezza, M. Düren, M. Ehrenfried, G. Elbakian, F. Ellinghaus, R. Fabbri, A. Fantoni, L. Felawka, S. Frullani, D. Gabbert, G. Gapienko, V. Gapienko, F. Garibaldi, G. Gavrilov, V. Gharibyan, F. Giordano, S. Gliske, H. Guler, V. Guzey, S. Haan, C. Hadjidakis, M. Hartig, D. Hasch, G. Hill, A. Hillenbrand, M. Hoek, Y. Holler, I. Hristova, Y. Imazu, A. Ivanilov, H. E. Jackson, H. S. Jo, S. Joosten, R. Kaiser, G. Karyan, T. Keri, E. Kinney, A. Kisselev, V. Korotkov, V. Kozlov, P. Kravchenko, L. Lagamba, R. Lamb, L. Lapikás, I. Lehmann, P. Lenisa, A. López Ruiz, W. Lorenzon, X. G. Lu, X. R. Lu, B. Q. Ma, D. Mahon, N. C.R. Makins, S. I. Manaenkov, L. Manfré, Y. Mao, B. Marianski, A. Martinez De La Ossa, H. Marukyan, C. A. Miller, Y. Miyachi, A. Movsisyan, V. Muccifora, M. Murray, A. Mussgiller, E. Nappi, Y. Naryshkin, A. Nass, M. Negodaev, W. D. Nowak, L. L. Pappalardo, R. Perez-Benito, M. Raithel, P. E. Reimer, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, J. Rubin, D. Ryckbosch, Y. Salomatin, A. Schäfer, G. Schnell, K. P. Schüler, R. Shanidze, T. A. Shibata, V. Shutov, M. Stancari, M. Statera, E. Steffens, J. J.M. Steijger, J. Stewart, F. Stinzing, S. Taroian, A. Terkulov, A. Trzcinski, M. Tytgat, A. Vandenbroucke, Y. Van Haarlem, C. Van Hulse, M. Varanda, D. Veretennikov, V. Vikhrov, I. Vilardi, S. Wang, S. Yaschenko, H. Ye, Z. Ye, W. Yu, D. Zeiler, B. Zihlmann, P. Zupranski
  • Justus Liebig University Giessen
  • University of Michigan, Ann Arbor
  • A. Alikhanian Yerevan Institute of Physics
  • German Electron Synchrotron
  • Brookhaven National Laboratory
  • Andrzej Soltan Institute for Nuclear Studies
  • RAS - Saint Petersburg Nuclear Physics Institute
  • National Institute for Nuclear Physics
  • National Institute for Subatomic Physics
  • Vrije Universiteit Amsterdam
  • University of Glasgow
  • Institute for High Energy Physics
  • University of Ferrara
  • Istituto Superiore di Sanita
  • Massachusetts Institute of Technology
  • Friedrich-Alexander University Erlangen-Nürnberg
  • University of Illinois at Urbana-Champaign
  • University of Colorado Boulder
  • Johannes Gutenberg University Mainz
  • TRIUMF
  • Ghent University
  • Thomas Jefferson National Accelerator Facility
  • Goethe University Frankfurt
  • Institute of Science Tokyo
  • Argonne National Laboratory
  • RAS - P.N. Lebedev Physics Institute
  • Peking University
  • University of Regensburg
  • Joint Institute for Nuclear Research
  • Carnegie Mellon University

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

The nuclear-mass dependence of azimuthal cross-section asymmetries with respect to charge and longitudinal polarization of the lepton beam is studied for hard exclusive electroproduction of real photons. The observed beam-charge and beam-helicity asymmetries are attributed to the interference between the Bethe-Heitler and the deeply virtual Compton scattering processes. For various nuclei, the asymmetries are extracted for both coherent and incoherent-enriched regions, which involve different (combinations of) generalized parton distributions. For both regions, the asymmetries are compared to those for a free proton, and no nuclear-mass dependence is found.

Original languageEnglish
Article number035202
JournalPhysical Review C - Nuclear Physics
Volume81
Issue number3
DOIs
StatePublished - 5 Mar 2010

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