Study of the rare semileptonic decays $B_d^0 o K^* l^+ l^-$ in scalar leptoquark model

摘要

We study the effect of scalar leptoquarks on the exclusive rare $B$ mesondecays $\bar{B}_d^0 \rightarrow \bar{K}^{* 0}\left(\rightarrow K^-\pi^+\right)l^+ l^-$ in the full kinematically accessible physical region. We work out theconstraints on leptoquark parameter space using the measured branching ratio of$B_s \rightarrow \mu^+ \mu^-$ process by the CMS and LHCb collaborations. Wecompute the branching ratio, forward-backward asymmetry and isospin asymmetrydistribution using the constrained parameter space. We also look into variousform factor independent and CP violating observables in the scalar leptoquarkmodel.