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Measurements of branching fractions for B+ -> rho(+)gamma, B-0 -> rho(0)gamma, and B-0 -> omega gamma

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Aubert, B., Bona, M., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Tico, J. Garra, Grauges, E. et al.
(2008) Measurements of branching fractions for B+ -> rho(+)gamma, B-0 -> rho(0)gamma, and B-0 -> omega gamma. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.78 (No.11). article no. 112001. doi:10.1103/PhysRevD.78.112001

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Abstract

We present branching fraction measurements for the radiative decays B+-> rho(+)gamma, B-0 -> rho(0)gamma, and B-0 -> omega gamma. The analysis is based on a data sample of 465 X 10(6) B (B) over bar 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+ -> rho(+)gamma) = (1.20(-0.37)(+0.42) +/- 0.20) X 10(-6), B(B-0 -> rho(0)gamma) = (0.97(-0.22)(+0.24) +/- 0.06) X 10(-6), and a 90% C.L. upper limit B(B-0 -> omega gamma) < 0.9 X 10(-6), where the first error is statistical and the second is systematic. We also measure the isospin-violating quantity Gamma(B+ -> rho(+)gamma)/2 Gamma(B-0 -> rho(0)gamma) - 1 = -0.43 (+0.25)(-0.22) +/- 0.10.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: December 2008
Dates:
DateEvent
December 2008UNSPECIFIED
Volume: Vol.78
Number: No.11
Number of Pages: 11
Page Range: article no. 112001
DOI: 10.1103/PhysRevD.78.112001
Status: Peer Reviewed
Publication Status: Published

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