A Measurement of CP Asymmetry in b->sgamma using a Sum of Exclusive Final States

Details A Measurement of CP Asymmetry in b->sgamma using a Sum of Exclusive Final States A Measurement of CP Asymmetry in b->sgamma using a Sum of Exclusive Final States

2008-05-30

arxiv.org/abs/0805.4796v3

Phys.Rev.Lett.101:171804,2008

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 10 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.101.171804

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.

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