QCD Corrections to the Radiative Decay B -> X_s gamma

Details QCD Corrections to the Radiative Decay B -> X_s gamma QCD Corrections to the Radiative Decay B -> X_s gamma

2008-11-29

arxiv.org/abs/0812.0082v1

Mod.Phys.Lett.A23:3123-3140,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures. Invited review for Modern Physics Letters A

Scientific paper

10.1142/S021773230802879X

In this short review, the calculation of the next-to-next-to-leading order QCD corrections to the inclusive radiative decay B -> X_s gamma is described. I summarize the salient features of the calculational framework adopted, discuss the results obtained in the last few years, and indicate the technical tools that made the NNLO calculations possible. I conclude by comparing the current NNLO theoretical estimate for the branching ratio with the experimental measurement and by briefly discussing the size and origin of the residual theoretical uncertainty.

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