Measurement of deeply virtual compton scattering beam-spin asymmetries. - Girod FX; Niyazov RA; Avakian H; Ball J; Bedlinskiy I; Burkert VD; De Masi R; Elouadrhiri L; Garçon M; Guidal M; Jo HS; Joo K; et al. (Physical review letters, 2008)