Rare FCNC radiative leptonic Bs,d→γl+l− decays in the Standard Modelстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:We revisit rare radiative leptonic decays Bs;d → γee and Bs;d → γμμ in the standard model and provide the updated estimates for various differential distributions (the branching ratios, the forward-backward asymmetry, and Rμ/e, the ratio of the differential distribution for muons over electrons in the final state). The new ingredients of this work compared to the existing theoretical analyses are the following: (i)we calculate all Bd → γ and Bs → γ form factors induced by the vector, axial-vector, tensor and pseudotensor quark currents within the relativistic dispersion approach based on the constituent quark picture; (ii) we perform a detailed analysis of the charm-loop contributions to radiative leptonic decays: we obtain constraints imposed by electromagnetic gauge invariance and discuss the existing ambiguities in the charmonia contributions.