We perform the first global fit to inclusive BβXsβΞ³ measurements
using a model-independent treatment of the nonperturbative b-quark
distribution function, with next-to-next-to-leading logarithmic resummation and
O(Ξ±s2β) fixed-order contributions. The normalization of the
BβXsβΞ³ decay rate, given by β£C7inclβVtbβVtsβββ£2, is sensitive to physics beyond the Standard Model (SM). We
determine β£C7inclβVtbβVtsβββ£=(14.77Β±0.51fitβΒ±0.59theoryβΒ±0.08paramβ)Γ10β3, in good
agreement with the SM prediction, and the b-quark mass mb1Sβ=(4.750Β±0.027fitβΒ±0.033theoryβΒ±0.003paramβ)GeV.
Our results suggest that the uncertainties in the extracted BβXsβΞ³
rate have been underestimated by up to a factor of two, leaving more room for
beyond-SM contributions.Comment: 21 pages, 8 figure