The branching fractions of the exclusive decays B0→K*0γ and B+→K*+γ are measured from a sample of (22.74±0.36)×10^6 BB̅ decays collected with the BABAR detector at the PEP-II asymmetric e+e- collider. We find B(B0→K*0γ) = [4.23±0.40(stat)±0.22(syst)]×10-5, B(B+→K*+γ) = [3.83±0.62(stat)±0.22(syst)]×10-5 and constrain the CP-violating charge asymmetry to be -0.170<ACP(B→K*γ)<0.082 at 90% C.L.
Measurement of B→K*γ Branching Fractions and Charge Asymmetries
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;SIMI, GABRIELE;
2002
Abstract
The branching fractions of the exclusive decays B0→K*0γ and B+→K*+γ are measured from a sample of (22.74±0.36)×10^6 BB̅ decays collected with the BABAR detector at the PEP-II asymmetric e+e- collider. We find B(B0→K*0γ) = [4.23±0.40(stat)±0.22(syst)]×10-5, B(B+→K*+γ) = [3.83±0.62(stat)±0.22(syst)]×10-5 and constrain the CP-violating charge asymmetry to be -0.170
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