Measurement of the beam-spin azimuthal asymmetry associated with deeply-virtual Compton scattering Academic Article uri icon

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 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 moment was measured to be -0.230.04(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. 2001 The American Physical Society.

published proceedings

  • PHYSICAL REVIEW LETTERS

author list (cited authors)

  • Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Achenauer, E. C., Avakian, H., ... Zohrabian, H.

citation count

  • 249

complete list of authors

  • Airapetian, A||Akopov, N||Akopov, Z||Amarian, M||Aschenauer, EC||Avakian, H||Avakian, R||Avetissian, A||Avetissian, E||Bailey, P||Bains, B||Baturin, V||Baumgarten, C||Beckmann, M||Belostotski, S||Bernreuther, S||Bianchi, N||Böttcher, H||Borissov, A||Bouhali, O||Bouwhuis, M||Brack, J||Brauksiepe, S||Brückner, W||Brüll, A||Brunn, I||Bulten, HJ||Capitani, GP||Chumney, P||Cisbani, E||Ciullo, G||Court, GR||Dalpiaz, PF||De Leo, R||De Nardo, L||De Sanctis, E||De Schepper, D||Devitsin, E||de Witt Huberts, PKA||Di Nezza, P||Düren, M||Ehrenfried, M||Elbakian, G||Ellinghaus, F||Ely, J||Fabbri, R||Fantoni, A||Fechtchenko, A||Felawka, L||Filippone, BW||Fischer, H||Fox, B||Franz, J||Frullani, S||Gärber, Y||Garibaldi, F||Garutti, E||Gavrilov, G||Gharibyan, V||Golendukhin, A||Graw, G||Grebeniouk, O||Green, PW||Greeniaus, LG||Gute, A||Haeberli, W||Hafidi, K||Hartig, M||Hasch, D||Heesbeen, D||Heinsius, FH||Henoch, M||Hertenberger, R||Hesselink, WHA||Hofman, G||Holler, Y||Holt, RJ||Hommez, B||Iarygin, G||Izotov, A||Jackson, HE||Jgoun, A||Jung, P||Kaiser, R||Kanesaka, J||Kinney, E||Kisselev, A||Kitching, P||Kobayashi, H||Koch, N||Königsmann, K||Kolster, H||Korotkov, V||Kotik, E||Kozlov, V||Krauss, B||Krivokhijine, VG||Kyle, G||Lagamba, L||Laziev, A||Lenisa, P||Liebing, P||Lindemann, T||Lorenzon, W||Maas, A||Makins, NCR||Marukyan, H||Masoli, F||McAndrew, M||McIlhany, K||Meissner, F||Menden, F||Meyners, N||Mikloukho, O||Miller, CA||Milner, R||Muccifora, V||Mussa, R||Nagaitsev, A||Nappi, E||Naryshkin, Y||Nass, A||Negodaeva, K||Nowak, W-D||Oganessyan, K||O'Neill, TG||Owen, BR||Pate, SF||Potashov, S||Potterveld, DH||Raithel, M||Rakness, G||Rappoport, V||Redwine, R||Reggiani, D||Reolon, AR||Rith, K||Robinson, D||Rostomyan, A||Ruh, M||Ryckbosch, D||Sakemi, Y||Sanjiev, I||Sato, F||Savin, I||Scarlett, C||Schäfer, A||Schill, C||Schmidt, F||Schnell, G||Schüler, KP||Schwind, A||Seibert, J||Seitz, B||Shibata, T-A||Shutov, V||Simani, MC||Simon, A||Sinram, K||Steffens, E||Steijger, JJM||Stewart, J||Stösslein, U||Suetsugu, K||Taroian, S||Terkulov, A||Tessarin, S||Thomas, E||Tipton, B||Tytgat, M||Urciuoli, GM||van den Brand, JFJ||van Steenhoven, G||van Vyver, R||van Hunen, JJ||Vetterli, MC||Vikhrov, V||Vincter, MG||Visser, J||Weiskopf, C||Wendland, J||Wilbert, J||Wise, T||Yen, S||Yoneyama, S||Zohrabian, H

publication date

  • October 2001