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Measurement of double-spin asymmetries associated with deeply virtual Compton scattering on a transversely polarized hydrogen target

  • A. Airapetian
  • , N. Akopov
  • , Z. Akopov
  • , E. C. Aschenauer
  • , W. Augustyniak
  • , R. Avakian
  • , A. Avetissian
  • , E. Avetisyan
  • , S. Belostotski
  • , N. Bianchi
  • , H. P. Blok
  • , A. Borissov
  • , J. Bowles
  • , I. Brodski
  • , 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, 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, M. Golembiovskaya, M. Hartig, D. Hasch, 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, V. G. Krivokhijine, L. Lagamba, 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, 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, B. Seitz, T. A. Shibata, V. Shutov, M. Stancari, M. Statera, E. Steffens, J. J.M. Steijger, F. Stinzing, S. Taroian, A. Terkulov, R. Truty, A. Trzcinski, M. Tytgat, Y. Van Haarlem, C. Van Hulse, D. Veretennikov, V. Vikhrov, I. Vilardi, S. Wang, S. Yaschenko, Z. Ye, S. Yen, V. Zagrebelnyy, D. Zeiler, B. Zihlmann, P. Zupranski
  • Justus Liebig University Giessen
  • University of Michigan, Ann Arbor
  • A. Alikhanian Yerevan Institute of Physics
  • German Electron Synchrotron
  • 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
  • Ghent University
  • University of Colorado Boulder
  • TRIUMF
  • Argonne National Laboratory
  • Tokyo Institute of Technology
  • University of Illinois at Urbana-Champaign
  • RAS - P.N. Lebedev Physics Institute
  • Friedrich-Alexander University Erlangen-Nürnberg
  • Joint Institute for Nuclear Research
  • Peking University
  • University of Regensburg

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Double-spin asymmetries in exclusive electroproduction of real photons from a transversely polarized hydrogen target are measured with respect to the product of target polarization with beam helicity and beam charge, and with respect to the product of target polarization with beam helicity alone. The asymmetries arise from the deeply virtual Compton scattering process and its interference with the Bethe-Heitler process. They are related to the real part of the same combination of Compton form factors as that determining the previously published transverse target single-spin asymmetries through the imaginary part. The results for the double-spin asymmetries are found to be compatible with zero within the uncertainties of the measurement, and are not incompatible with the predictions of the only available GPD-based calculation.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume704
Issue number1-2
DOIs
StatePublished - 5 Oct 2011

Keywords

  • DVCS
  • GPDs
  • HERMES experiments
  • Transversely polarized hydrogen target

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