Rare B → πll̄ and B → ρll̄ decays in the relativistic quark modelстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 30 апреля 2017 г.
Аннотация:The branching fractions of the rare weak B → πl+l-(νν̄) and B → ρl+l-(νν̄) decays are calculated in the framework of the relativistic quark model based on the quasipotential approach. The form factors parametrizing weak decay matrix elements are explicitly determined in the whole kinematical q2 range without additional assumptions and extrapolations. Relativistic effects are systematically taken into account, including recoil effects in meson wave functions and contributions of the intermediate negative-energy states. New experimental data on the differential distributions in the semileptonic heavy-to-light B → πlνl and B → ρlνl decays are analyzed in detail. Good agreement of the predictions and data is found. The results obtained for the branching fractions of the rare semileptonic decays are found to be in agreement with other theoretical estimates and recent experimental data available for the B+ → π+μ+μ- decay.