Observation of exclusive deeply virtual compton scattering in polarized electron beam asymmetry measurements Article

cited authors

  • Stepanyan, S; Burkert, VD; Elouadrhiri, L; Adams, GS; Anciant, E; Anghinolfi, M; Asavapibhop, B; Audit, G; Auger, T; Avakian, H; Ball, J; Barrow, S; Battaglieri, M; Beard, K; Bektasoglu, M; Bertin, P; Bianchi, N; Biselli, A; Boiarinov, S; Bonner, BE; Bouchigny, S; Branford, D; Brooks, WK; Calarco, JR; Carman, DS; Carnahan, B; Ciciani, L; Cole, PL; Coleman, A; Cords, D; Corvisiero, P; Crabb, D; Crannell, H; Cummings, J; Degtiarenko, PV; Denizli, H; Dennis, LC; De Sanctis, E; DeVita, R; Dharmawardane, KV; Djalali, C; Dodge, GE; Doré, D; Doughty, D; Dragovitsch, P; Dytman, S; Eckhause, M; Egiyan, H; Egiyan, KS; Empl, A; Fatemi, R; Feuerbach, RJ; Ficenec, J; Fissum, K; Forest, TA; Freyberger, AP; Funsten, H; Gaff, S; Gai, M; Garçon, M; Gavalian, G; Gilad, S; Gilfoyle, GP; Giovanetti, K; Girard, P; Griffioen, KA; Guidal, M; Guillo, M; Gyurjyan, V; Hadjidakis, C; Hardie, J; Heddle, D; Hersman, FW; Hicks, K; Hicks, RS; Holtrop, M; Hu, J; Hyde-Wright, CE; Ito, MM; Jenkins, D; Joo, K; Kelley, J; Khandaker, M; Kim, DH; Kim, K; Kim, KY; Kim, W; Klein, A; Klein, FJ; Klusman, M; Kossov, M; Kramer, LH; Kuhn, SE; Laget, JM; Lawrence, D; Longhi, A; Lukashin, K; Manak, JJ; Marchand, C; McAleer, S

fiu authors

abstract

  • The first measurement of the beam-spin asymmetry in exclusive electroproduction of real photons in the deeply inelastic regime was performed. A large asymmetry with sinφ modulation was observed as predicted by the interference of deeply virtual Compton scattering (DVCS) and the Bethe-Heitler process. The amplitude of the modulation was calculated to be about α=0.202±0.028. α was found to be directly proportional to the imaginary part of the DVCS amplitude, in leading-order and leading-twist perturbative quantum chromodynamic (QCD) corrections.

publication date

  • October 29, 2001

start page

  • 1820021

end page

  • 1820025

volume

  • 87

issue

  • 18