Scalar Leptoquarks and the Rare B Meson Decays

We study some rare decays of B meson involving the quark level transition b -> ql(+)l(-) (q=d, s) in the scalar leptoquark model. We constrain the leptoquark parameter space using the recently measured branching ratios of Bs,d -> mu(+)mu(-) processes. Using such parameters, we obtain the branching ratios, direct CP violation parameters and isospin asymmetries in B -> K mu(+)mu(-) and B -> pi mu(+)mu(-) processes. We also obtain the branching ratios for some lepton flavour violating decays B -> l(i)(+)l(j)(-). We find that the various anomalies associated with the isospin asymmetries of B -> K mu(+)mu(-) process can be explained in the scalar leptoquark model.