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

Abstract

The puzzle of $R(D^{(\ast )})$ associated with $B\to D^{(\ast )}\tau \nu$ decay is addressed in the two-HIggs-doublet model. An anomalous coupling of $\tau$ to the charged Higgs is introduced to fit the data from BaBar, Belle, and LHCb. It is shown that all of the four types of the model yield similar values of the minimum ${\chi }^2$. Also shown is that the newly normalized $R(D^{(\ast )})$ with the branching ratio of $B\to \tau \nu$ decay exhibits much smaller minimum ${\chi }^2$.

14 pages, 5 tables, 6 figures. More discussions for the model. To appear in PRD

References in corpus (8)

• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• On the B to D* tau nu Sensitivity to New Physics
• Measurement of the branching ratio of ${\bar{B}}^0\to D^{\ast +}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to ${\bar{B}}^0\to D^{\ast +}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with a semileptonic tagging method
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• Analyzing new physics in the decays ${\bar{B}}^0\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ with form factors obtained from the covariant quark model
• Probing new physics in ${\bar{B}}^0\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ using the longitudinal, transverse, and normal polarization components of the tau lepton
• Scalar doublet models confront $\tau$ and $b$ anomalies
• $R(D^{(\ast )})$ and $\mathcal{B}r(B\to \tau {\nu }_{\tau })$ in a Flipped/Lepton-Specific 2HDM with anomalously enhanced charged Higgs coupling to $\tau$/b

Cited by in corpus (13)

• Implications of new physics in the decays $B_c\to (J/\psi ,{\eta }_c)\tau \nu$
• $B$ Flavour Anomalies: 2021 Theoretical Status Report
• Towards ruling out the charged Higgs interpretation of the $R_{D^{(\ast )}}$ anomaly
• Common explanation to the $R_{K^{(\ast )}}$, $R_{D^{(\ast )}}$ and ${\epsilon }^{\prime }/\epsilon$ anomalies in a 3HDM+${\nu }_R$ and connections to neutrino physics
• Revival of $H^{-}$ interpretation of $R_{D^{(\ast )}}$ anomaly and closing low mass window
• Towards a viable scalar interpretation of $R_{D^{(\ast )}}$
• Analysing the charged scalar boson contribution to the charged-current $B$ meson anomalies
• Coup de grace to the charged Higgs solution of $P_5^{\prime }$ and $R_{D^{(\ast )}}$ discrepancies
• Detailed Study of the Decay Lambda_b --> Lambda_c tau {\bar ν}_τ
• Interplay of the charged Higgs effects in $R_{D^{(\ast )}}$, $b\to s{\ell }^{+}{\ell }^{-}$ and $W$-mass
• Polarization in (quasi-)two-body decays and new physics
• $B$ anomalies in the nonminimal universal extra dimension model
• Status of G2HDM with right handed neutrino coupling in the light of $b\to c\tau \nu$ anomalies