Measurement of branching fractions and CP and isospin asymmetries for B -> K-*gamma

Journal article

The branching fractions of the decays B0 → K*0 γ and B+ → K*+ γ are measured using a sample of 88 × 106BB̄ events collected with the BABAR detector at the PEP-II asymmetric-energy e +e- collider. We find B(B0 → K* γ) = [3.92 ± 0.20(stat) ± 0.24(syst)] × 10 -5, B(B+ → K*+ γ) = [3.87 ± 0.28(stat) ± 0.26(syst)] × 10-5. Our measurements also constrain the direct CP asymmetry to be -0.074 < A(B → K* γ) < 0.049 and the isospin asymmetry to be -0.046 < Δ0-̈ < 0.146, both at the 90% confidence level.

Authors: Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, J

• Publication status: Published
• Journal: Physical Review D
• Volume: 70
• Issue: 11
• Publication date: 2004-12-01
• DOI: 10.1103/PhysRevD.70.112006
• EISSN: 1550-2368
• ISSN: 0556-2821
• Language: English