Study of the rare semileptonic decays $B_d^0\to K^{\ast }{l}^{+}{l}^{-}$ in scalar leptoquark model

Abstract

We study the effect of scalar leptoquarks on the exclusive rare $B$ meson decays ${\bar{B}}_d^0\to {\bar{K}}^{\ast 0}\left(\to K^{-}{\pi }^{+}\right)l^{+}{l}^{-}$ in the full kinematically accessible physical region. We work out the constraints on leptoquark parameter space using the measured branching ratio of $B_s\to {\mu }^{+}{\mu }^{-}$ process by the CMS and LHCb collaborations. We compute the branching ratio, forward-backward asymmetry and isospin asymmetry distribution using the constrained parameter space. We also look into various form factor independent and CP violating observables in the scalar leptoquark model.

34 pages, 11 figures, version to appear in Phys. Rev. D

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