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Babar, Belle and recently LHCb has reported an excess in the measurements of$R(D^{*})$, $R(D)$ and $\mathcal{B}r(B \rightarrow \tau \nu_{\tau} )$ thanexpected from SM, a possible signature of lepton flavor universality violatingNP. In this work we analyze the phenomenological implications for these decaymodes in a Flipped/Lepton-Specific 2HDM with anomalously enhanced Yukawacoupling of $H^{\pm}$ to $\tau$/b. When experimental and theoretical errors areadded in quadrature, we conclude that this phenomenological extension of SM cangive results in agreement within 1$\sigma$ deviation for the combination of$R(D^{(*)})$ and $\mathcal{B}r(B \rightarrow \tau \nu_{\tau})$ compare to about4$\sigma$ deviation from SM from the latest combined[Babar,Belle,LHCb]experimental data for these observables.

physical review. d/physical review. d.

$R(D^{(*)})$ and $\mathcal{B}r(B \rightarrow \tau\nu_{\tau})$ in a  Flipped/Lepton-Specific 2HDM with anomalously enhanced charged Higgs coupling  to $\tau$/b