Signature of (axial)vector operators in $B_c\to D_s^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays

Abstract

The persistent anomalies observed in $B$ mesons related to $b\to s{\mu }^{+}{\mu }^{-}$ 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 $B_c\to D_s^{(\ast )}{\mu }^{+}{\mu }^{-}$ within an effective field theory formalism. We perform a global fit to new (axial)vector couplings using the current experimental data for $b\to s{\mu }^{+}{\mu }^{-}$ transitions. We compute the branching ratios and physical observables such as forward-backward asymmetries, lepton polarization asymmetries, form factor independent observables for $B_c\to D_s^{(\ast )}{\mu }^{+}{\mu }^{-}$, both within the Standard Model and in new physics scenarios. Additionally, we examine the existence of lepton flavor universality violation in the $B_c\to D_s^{(\ast )}{\ell }^{+}{\ell }^{-}$ process.

Comments: 13 Pages, 6 Figures, Accepted for publication in PLB