B→μ+μ−in the two-Higgs-doublet model

Abstract

The rare decay B→${\mu }^{+}$ ${\mu }^{\mathrm{-}}$ is studied within the context of the two-Higgs-doublet extension of the standard model. We show that for a reasonable range of model parameters, the charged-Higgs-scalar contribution exceeds the conventional contributions from the standard model. For the process $B_s$→${\mu }^{+}$ ${\mu }^{\mathrm{-}}$, branching fractions ≳${10}^{\mathrm{-}8}$ are possible in this scenario. For the process Z→bq¯+b¯q, we find the charged-Higgs-boson contribution leads to branching fractions ≳${10}^{\mathrm{-}6}$.