New physics footprints in the angular distribution of $B_s\to D_s^{\ast }(\to D_s\gamma ,D_s\pi )\tau \nu$ decays

Nilakshi Das, Rupak Dutta

Hints of lepton flavor universality violation observed in various flavor ratios such as $R_D$, $R_{D^{\ast }}$, $R_{J/\psi }$, $P_{\tau }^{D^{\ast }}$ and $F_L^{D^{\ast }}$ in $B\to D^{(\ast )}\ell \nu$ and $B…