Weak Radiative B-Meson Decay Beyond Leading Logarithms

Details Weak Radiative B-Meson Decay Beyond Leading Logarithms Weak Radiative B-Meson Decay Beyond Leading Logarithms

1996-12-10

arxiv.org/abs/hep-ph/9612313v3

Phys.Lett.B400:206-219,1997; Erratum-ibid.B425:414,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

Formulae for f_88(delta), f_78(delta), f_12(delta) and the first equation in Appendix B corrected

Scientific paper

10.1016/S0370-2693(97)00324-9

We present our results for three-loop anomalous dimensions necessary in analyzing $B{\to}X_s\gamma$ decay at the next-to-leading order in QCD. We combine them with other recently calculated contributions, obtaining a practically complete next-to-leading order prediction for the branching ratio ${\cal B}(B{\to}X_s\gamma) = (3.28 \pm 0.33) \times 10^{-4}$. The uncertainty is more than twice smaller than in the previously available leading order theoretical result. The Standard Model prediction remains in agreement with the CLEO measurement at the $2 \sigma$ level.

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