Precision global determination of the B→X${}_s$γ decay rate

We perform the first global fit to inclusive B→X${}_s$γ measurements using a model-independent treatment of the nonperturbative b-quark distribution function, with next-to-next-to-leading logarithmic resummation and O(α${}_s^2$) fixed-order contributions. The normalization of the B→X${}_s$γ decay rate, given by |C${}_7^{incl}$V${}_{tb}$V${}_{ts}^{\ast }$|${}^2$, is sensitive to physics beyond the Standard Model (SM). We determine |C${}_7^{incl}$V${}_{tb}$V${}_{ts}^{\ast }$|=(14.77±0.51${}_{fit}$±0.59${}_{theory}$±0.08${}_{param}$)×10${}^{-3}$, in good agreement with the SM prediction, and the b-quark mass m${}_b^{1S}$=(4.750±0.027${}_{fit}$±0.033${}_{theory}$±0.003${}_{param}$) GeV. Our results suggest that the uncertainties in the extracted B→Xsγ rate have been underestimated by up to a factor of two, leaving more room for beyond-SM contributions.