Leptoquark effects on and b → sνν¯ and B → KI < sup > +/- < /sup > decay processes

Abstract

We study the rare semileptonic decays of B mesons induced by b → sνν¯ as well as b → sl+l- transitions in the scalar leptoquark (LQ) model, where the LQs have the representation (3, 2, 7/6) and (3, 2, 1/6) under the standard model gauge group. The LQ parameter space is constrained using the most recent experimental results on Br(Bs → μ+μ-) and Br (Bd → Xsμ+μ- processes. Considering only the baryon number conserving LQ interactions, we estimate the branching ratios for the exclusive B¯ → K¯(∗)νν¯ and inclusive B → Xsνν¯ decay processes by using the constraint parameters. We also obtain the low recoil (large lepton invariant mass, i.e., q2 ∼ mb2) predictions for the angular distribution of B¯ K¯l+l- process and several other observables including the flat term and lepton flavour non-universality factor in this model.