Paper detail

Efficacy of scalar leptoquark on $B_s \to (K^{(*)}, D_s^{(*)}) τ\bar ν_τ$ decay modes

We scrutinize the impact of various relevant scalar leptoquarks on the physical observables associated with the rare semileptonic decay processes of $B_s$ meson involving $b \to (u, c) l\bar ν_l$ quark level transitions. We constrain the new parameter space consistent with the experimental limit on Br($B_{u,c} \to τν_l$), Br($B \to πτ\bar ν_τ$), $R_{D^{(*)}}, R_{J/ψ}$ and $R_π^l$ observables. Using the allowed parameter space, we compute the branching ratios, forward-backward asymmetries, lepton and hardon polarization asymmetries of $B_s \to (K^{(*)}, D_s^{(*)}) τ\bar ν_τ$ decay modes. Forbye, we look at the possibility of existence of lepton non-universality in these processes.