Analysis of B(B{yields}X{sub s}{gamma}) at Next-to-Next-to-Leading Order with a Cut on Photon Energy

Journal Article · Fri Jan 12 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.022003· OSTI ID:20861594

Becher, Thomas ^[1]; Neubert, Matthias ^[2]

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1. Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
2. Institute for High-Energy Phenomenology, Laboratory for Elementary-Particle Physics, Cornell University, Ithaca, New York 14853 (United States)

By combining a recent estimate of the total B{yields}X{sub s}{gamma} branching fraction at O({alpha}{sub s}{sup 2}) with a detailed analysis of the effects of a cut E{sub {gamma}}{>=}1.6 GeV on photon energy, a prediction for the partial B{yields}X{sub s}{gamma} branching fraction at next-to-next-to-leading order in renormalization-group improved perturbation theory is obtained, in which contributions from all relevant scales are factorized. The result B(B{yields}X{sub s}{gamma})=(2.98{+-}0.26)x10{sup -4} is about 1.4{sigma} lower than the experimental world average. This opens a window for significant new physics contributions in rare radiative B decays.

• OSTI ID: 20861594
• Journal Information: Physical Review Letters, Vol. 98, Issue 2; Other Information: DOI: 10.1103/PhysRevLett.98.022003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BRANCHING RATIO
ENERGY ANALYSIS
GEV RANGE 01-10
PARTICLE DECAY
PERTURBATION THEORY
PHOTONS
RENORMALIZATION