Revisit to the $b\to c\tau \nu$ transition: in and beyond the SM

Kingman Cheung, Zhuo-Ran Huang, Hua-Dong Li +3

We perform an analysis of the $b\to c\tau \nu$ data, including $R(D^{(\ast )})$, $R(J/\psi )$, $P_{\tau }(D^{\ast })$ and $F_L^{D^{\ast }}$, within and beyond the Standard Model (SM). We fit the $B\to D^{(\ast )}$…