Signature of (axial) vector operators in Bc Dₛ^ (*) ^+ ^- decays

The persistent anomalies observed in B mesons related to b s ^+ ^- transitions point to the potential for new physics beyond the Standard Model. To explore this further, we conduct an analysis of the exclusive semileptonic decays Bc Dₛ^ (*) ^+ ^- within an effective field theory formalism. We perform a global fit to new (axial) vector couplings using the current experimental data for b s ^+ ^- transitions. We compute the branching ratios and physical observables such as forward-backward asymmetries, lepton polarization asymmetries, form factor independent observables for Bc Dₛ^ (*) ^+ ^-, both within the Standard Model and in new physics scenarios. Additionally, we examine the existence of lepton flavor universality violation in the Bc Dₛ^ (*) ^+ ^- process.