Measurement of B -> K-*γ branching fractions and charge asymmetries

The branching fractions of the exclusive decays B 0 → K * 0 γ and B + → K * + γ are measured from a sample of (22.74 ′ 0.36) X 10 6 BB decays collected with the BABAR detector at the PEP-II asymmetric e + e - collider. We find B(B 0 → K * 0 γ) = [4.23 ′ 0.40(stat) ′ 0.22(syst)] × 10 - 5 , B(B + → K * + γ) = [3.83 ′ 0.62(stat) ′ 0.22(syst)] X 10 - 5 and constrain the CP-violating charge asymmetry to be -0.170 < A C P (B → K * γ) < 0.082 at 90% C.L.