A Measurement of CP Asymmetry in b->sgamma using a Sum of Exclusive Final States
arXiv:0805.4796 · doi:10.1103/PhysRevLett.101.171804
Abstract
We perform a measurement of the CP asymmetry in b->sgamma decays using a sample of 383 BB events collected by the BABAR detector at the PEP-II asymmetric B factory. We reconstruct sixteen flavor-specific B decay modes containing a high-energy photon and a hadronic system (Xs) containing an s quark. We measure the \CP asymmetry to be -0.011+/- 0.030(stat)+/-0.014(syst) for a photon energy threshold at 1.6 GeV and the hadronic system mass between 0.6 and 2.8 GeV/c2.
7 pages, 10 figures, submitted to Phys. Rev. Lett