We present branching fraction measurements for the radiative decays B+→ρ+γ, B0→ρ0γ, and B0→ωγ. The analysis is based on a data sample of 465×106 BB̄ events collected with the BABAR detector at the PEP-II asymmetric-energy B Factory located at the Stanford Linear Accelerator Center. We find B(B+→ρ+γ)=(1.20-0. 37+0.42±0.20)×10-6, B(B0→ρ0γ)=(0.97-0.22+0. 24±0.06)×10-6, and a 90% C.L. upper limit B(B0→ωγ) <0.9×10-6, where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity Γ(B+→ρ +γ)/2Γ(B0→ρ0γ)-1=-0.43-0.22+0.25±0.10.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Measurements of branching fractions for B+→ρ+γ, B0→ρ0γ, and B0→ωγ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(11) [10.1103/PhysRevD.78.112001].

Measurements of branching fractions for B+→ρ+γ, B0→ρ0γ, and B0→ωγ

CARPINELLI, Massimo;
2008

Abstract

We present branching fraction measurements for the radiative decays B+→ρ+γ, B0→ρ0γ, and B0→ωγ. The analysis is based on a data sample of 465×106 BB̄ events collected with the BABAR detector at the PEP-II asymmetric-energy B Factory located at the Stanford Linear Accelerator Center. We find B(B+→ρ+γ)=(1.20-0. 37+0.42±0.20)×10-6, B(B0→ρ0γ)=(0.97-0.22+0. 24±0.06)×10-6, and a 90% C.L. upper limit B(B0→ωγ) <0.9×10-6, where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity Γ(B+→ρ +γ)/2Γ(B0→ρ0γ)-1=-0.43-0.22+0.25±0.10.
Articolo in rivista - Articolo scientifico
BABAR detector
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Measurements of branching fractions for B+→ρ+γ, B0→ρ0γ, and B0→ωγ. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(11) [10.1103/PhysRevD.78.112001].
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