Study of ediated FCNC Effects on (formula presented)emileptonic Decay

Abstract

The effects of a mediated flavor changing neutral current (FCNC) transition on the semileptonic ecay are studied. The differential branching fraction for this decay found by LHCb collaboration is elow the Standard Model predictions for the range. We therefore perform an analysis of this observable in the 331 odel for the low region. effects on other observables such as the forward-backward asymmetry and lepton polarisation asymmetries are also studied. The constraints for the new couplings to the leptons and quarks are obtained from studies of mixing, analysis of and. It is found that for some values of these couplings, the observables in the low region can be quite sensitive to effects.