Measurement of B decays to phi K gamma
- Aubert, B.
- Chen, J.Y.
- Peters, K.
- Zhang, L.L.
- Chen, S.
- Wang, W.
- Li, X.H.
- Baak, M.A.
- Raven, G.
- Snoek, H.
- David, P.
- Schroder, H.
- Liu, H.
- van Bakel, N.
- Wagner, A.
- Yu, Z.
DOIAbstract
We search for the decays B-→ K-γ and B̄0→ K̄0γ in a data sample of 228×106 BB̄ pairs collected at the Υ(4S) resonance with the BABAR detector. We measure the branching fraction B(B-→ K-γ)=(3.5±0.6±0.4)×10-6 and set an upper limit B(B̄0→ K̄0γ)<2.7×10-6 at the 90% confidence level. We also measure the direct CP asymmetry in B-→ K-γ, ACP=(-26±14±5)%. The uncertainties are statistical and systematic, respectively. © 2007 The American Physical Society
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