Measurement of the CP Asymmetry in b→sγ Using a Sum of Exclusive Final States

We perform a measurement of the C P asymmetry in b → s γ decays using a sample of 383 × 10 6 B ¯¯¯ B events collected by the BABAR detector at the SLAC PEP-II asymmetric B factory. We reconstruct 16 flavor-specific B decay modes containing a high-energy photon and a hadronic system X s containing an...

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Bibliographic Details
Published in:Physical review letters 2008-10
Main Authors: Garra Ticó, Jordi, Graugés Pous, Eugeni, BABAR Collaboration
Format: Article
Language:English
Subjects:
Experiments
Física de partícules
Particle physics
Online Access:Get full text
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Summary:We perform a measurement of the C P asymmetry in b → s γ decays using a sample of 383 × 10 6 B ¯¯¯ B events collected by the BABAR detector at the SLAC PEP-II asymmetric B factory. We reconstruct 16 flavor-specific B decay modes containing a high-energy photon and a hadronic system X s containing an s quark. We measure the C P asymmetry to be − 0.011 ± 0.030 ( stat ) ± 0.014 ( syst ) for a hadronic system mass between 0.6 and 2.8     GeV / c 2 .
ISSN:0031-9007
DOI:10.1103/PhysRevLett.101.171804