Constraints on the charged scalar effects using the forward-backward asymmetry on $B\to D^{(\ast )}\tau \overline{{\nu }_{\tau }}$

Yasuhito Sakaki, Hidekazu Tanaka

The decay modes $\bar{B}\to D^{(\ast )}\tau {\bar{\nu }}_{\tau }$ are sensitive to charged scalar effects, such as the charged Higgs effects. In this paper we suggest a method to determine their effect…