Estimate ofB(B¯→Xsγ)atO(

Abstract

Combining our results for various O(alpha[s]) corrections to the weak radiative B-meson decay, we are able to present the first estimate of the branching ratio at the next-to-next-to-leading order in QCD. We find B(B[over ]-->X[s]gamma)=(3.15+/-0.23) x 10(-4) for Egamma>1.6 GeV in the B[over ]-meson rest frame. The four types of uncertainties:nonperturbative (5%), parametric (3%), higher-order (3%), and m(c)-interpolation ambiguity (3%) have been added in quadrature to obtain the total error.

An explicit Z ′-boson explanation of the B → K ∗ μ + μ − anomaly

“…Since the theoretical predictions for B → X s + − are rather sound, BaBar and Belle measurements of the inclusive rare semi-leptonic B decay based on the full data sets are urgently needed to clarify the situation. We also add that the preference for a small negative new-physics contribution to the Wilson coefficient C γ 7 , as found in both analyses [7,8], is a simple consequence [33] of the fact that the SM value of the branching ratio of B → X s γ [34,35] is around 1σ below the experimental world average [29].…”

A resolution of the flavor problem of two Higgs doublet models with an extra U(1)H symmetry for Higgs flavor

“…The most stringent bounds on the Type-II and Type-IV 2HDMs come from the radiative process b → sγ [13], which is about 300 GeV [14]. We note that the charged Higgs bosons in the Type-I and Type-III 2HDMs are loosely constrained by the b → sγ process.…”

Electroweak cogenesis

“…The prospects of other decay channels have been recently studied in [54], as well as possible modifications of Higgs properties from additional singlets [55]. The charged scalar may also be probed via associated production with gauge bosons [56], and is also constrained by the flavor violation process b → sγ to be heavier than 295 GeV [57] in the case of Type-II 2HDM.…”