Measurements of Branching Fractions for B+ -> rho+ gamma, B0 -> rho0 gamma, and B0 -> omega gamma

Details Measurements of Branching Fractions for B+ -> rho+ gamma, B0 -> rho0 gamma, and B0 -> omega gamma Measurements of Branching Fractions for B+ -> rho+ gamma, B0 -> rho0 gamma, and B0 -> omega gamma

2008-08-10

arxiv.org/abs/0808.1379v1

Phys.Rev.D78:112001,2008

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 9 postscript figures, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.78.112001

We present branching fraction measurements for the radiative decays B+ -> rho+ gamma, B0 -> rho0 gamma, and B0 -> omega gamma. The analysis is based on a data sample of 465 million BBbar events collected with the BaBar detector at the PEP-II asymmetric B factory. We find BR(B+ -> rho+ gamma) = (1.20 +0.42 -0.37 +/-0.20) x 10^-6, BR(B0 -> rho0 gamma) = (0.97 +0.24 -0.22 +/-0.06) x 10^-6, and a 90% C.L. upper limit BR(B0 -> omega gamma) < 0.9 x 10^-6, where the first error is statistical and the second is systematic. We also measure the isospin-violating quantities Gamma(B+ -> rho+ gamma) / 2Gamma(B0 -> rho0 gamma) - 1 = -0.43 +0.25 -0.22 +/-0.10.

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