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Measurement of deeply virtual compton scattering beam-spin asymmetries

  • F. X. Girod
  • , R. A. Niyazov
  • , H. Avakian
  • , J. Ball
  • , I. Bedlinskiy
  • , V. D. Burkert
  • , R. De Masi
  • , L. Elouadrhiri
  • , M. Garçon
  • , M. Guidal
  • , H. S. Jo
  • , K. Joo
  • , V. Kubarovsky
  • , S. V. Kuleshov
  • , M. MacCormick
  • , S. Niccolai
  • , O. Pogorelko
  • , F. Sabatié
  • , S. Stepanyan
  • , P. Stoler
  • M. Ungaro, B. Zhao, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, M. Battaglieri, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, V. Crede, N. Dashyan, E. De Sanctis, R. De Vita, P. V. Degtyarenko, A. Deur, K. V. Dharmawardane, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, M. Dugger, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, P. Eugenio, G. Fedotov, G. Feldman, H. Funsten, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, J. T. Goetz, A. Gonenc, R. W. Gothe, K. A. Griffioen, N. Guler, L. Guo, V. Gyurjyan, K. Hafidi, H. Hakobyan, C. Hanretty, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, J. R. Johnstone, H. G. Juengst, N. Kalantarians, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Kossov, Z. Krahn, L. H. Kramer, J. Kuhn, S. E. Kuhn, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, T. Lee, K. Livingston, H. Y. Lu, N. Markov, P. Mattione, M. Mazouz, B. McKinnon, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, B. Michel, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, K. Moriya, S. A. Morrow, M. Moteabbed, E. Munevar, G. S. Mutchler, P. Nadel-Turonski, R. Nasseripour, G. Niculescu, I. Niculescu, B. B. Niczyporuk, M. R. Niroula, M. Nozar, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, C. Paterson, S. Anefalos Pereira, J. Pierce, N. Pivnyuk, D. Pocanic, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, B. G. Ritchie, G. Rosner, P. Rossi, J. Salamanca, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, E. S. Smith, L. C. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. S. Stepanyan, B. E. Stokes, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, A. Tkabladze, S. Tkachenko, C. Tur, M. F. Vineyard, A. V. Vlassov, E. Voutier, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, Z. W. Zhao
  • CEA Saclay
  • Thomas Jefferson National Accelerator Facility
  • Rensselaer Polytechnic Institute
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Université Paris-Saclay
  • University of Connecticut
  • Old Dominion University
  • Florida International University
  • National Institute for Nuclear Physics
  • A. Alikhanian Yerevan Institute of Physics
  • Norfolk State University
  • Arizona State University
  • University of South Carolina
  • Kyungpook National University
  • Carnegie Mellon University
  • George Washington University
  • Fairfield University
  • Florida State University
  • University of Edinburgh
  • College of William and Mary
  • University of New Hampshire
  • Catholic University of America
  • Idaho State University
  • University of Virginia
  • University of Glasgow
  • Christopher Newport University
  • Argonne National Laboratory
  • Lomonosov Moscow State University
  • University of Richmond
  • James Madison University
  • University of California at Los Angeles
  • Ohio University
  • Université Blaise Pascal
  • Virginia Polytechnic Institute and State University
  • University of Massachusetts
  • Rice University
  • Université Joseph Fourier Grenoble 1
  • California State University Dominguez Hills
  • Union College

Research output: Contribution to journalArticlepeer-review

218 Scopus citations

Abstract

The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e→p→epγ) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (xB from 0.11 to 0.58, Q2 from 1 to 4.8GeV2, -t from 0.09 to 1.8GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, Aasin/(1+ccos). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

Original languageEnglish
Article number162002
JournalPhysical Review Letters
Volume100
Issue number16
DOIs
StatePublished - 23 Apr 2008

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