@article{e177c3ba42a84c6691dd54f5db5d0be9,
title = "Measurement of the beam-spin azimuthal asymmetry associated with deeply-virtual Compton scattering",
abstract = "The beam-spin asymmetry in hard electroproduction of photons has been measured. The data have been accumulated by the HERMES experiment at DESY using the HERA 27.6 GeV longitudinally polarized positron beam and an unpolarized hydrogen-gas target. The asymmetry in the azimuthal distribution of the produced photons in the angle phi relative to the lepton scattering plane was determined with respect to the helicity state of the incoming positron beam. The beam-spin analyzing power in the sin phi moment was measured to be -0.23 +/- 0.04(stat) +/- 0.03(syst) in the missing-mass range below 1.7 GeV. The observed asymmetry is attributed to the interference of the Bethe-Heitler and deeply virtual Compton scattering processes.",
keywords = "NUCLEON",
author = "A. Airapetian and N. Akopov and Z. Akopov and M. Amarian and E.C. Achenauer and H. Avakian and R. Avakian and A. Avetissian and E. Avetissian and P. Bailey and B. Bains and V. Baturin and C. Baumgarten and M. Beckmann and S. Belostotski and S. Bernreuther and N. Bianchi and H. Bottcher and A. Borissov and O. Bouhali and M. Bouwhuis and J. Brack and S. Brauksiepe and W. Bruckner and A. Brull and I. Brunn and H.J. Bulten and G.P. Capitani and P. Chumney and E. Cisbani and G. Ciullo and G.R. Court and P.F. Dalpiaz and {De Leo}, R. and {De Nardo}, L. and {De Sanctis}, E. and {De Schepper}, D. and E. Devitsin and P.K.A.D. Huberts and {Di Nezza}, P. and M. Duren and M. Ehrenfried and G. Elbakian and F. Ellinghaus and J. Ely and R. Fabbri and A. Fantoni and A. Fechtchenko and L. Felawka and {van den Brand}, J.F.J. and {HERMES Collaboration}",
year = "2001",
month = oct,
day = "29",
doi = "10.1103/PhysRevLett.87.182001",
language = "English",
volume = "87",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "18",
}