$B\ensuremath{\rightarrow}{D}^{(*)}\ensuremath{\tau}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ in the 2HDM with an anomalous $\ensuremath{\tau}$ coupling

$B \to D^{(*)} τ ν_{τ}$ in the 2HDM with an anomalous $τ$ coupling

Jong-Phil Lee

Phys. Rev. D 96, 055005 – Published 6 September 2017

Abstract

The puzzle of $R (D^{(*)})$ associated with $B \to D^{(*)} τ ν$ decay is addressed in the two-Higgs-doublet model. An anomalous coupling of $τ$ to the charged Higgs is introduced to fit the data from BABAR, Belle, and LHCb. It is shown that all four types of the model yield similar values for the minimum $χ^{2}$ . We also show that the newly normalized $R (D^{(*)})$ with the branching ratio of $B \to τ ν$ decay exhibits a much smaller minimum $χ^{2}$ .