QCD Calculations of Radiative B Decays

Details QCD Calculations of Radiative B Decays QCD Calculations of Radiative B Decays

2008-08-22

arxiv.org/abs/0808.3134v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 4 figures, contribution to the Proceedings of the IXth International Conference on Heavy Quarks and Leptons (HQL 2008

Scientific paper

The current status of B -> Xs gamma decay rate calculations is summarized. Missing ingredients at the NNLO level are listed. The global normalization factor and non-perturbative effects are discussed. Arguments are presented that results for the cutoff-enhanced perturbative corrections have been misused in Ref. [15] by applying them in the region E_gamma \in [1.0, 1.6] GeV, which means that the corresponding numerical effect on BR(B -> Xs gamma, E_gamma > 1.6 GeV) is unreliable.

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