Exclusive weak B decays involving $\tau$ lepton in the relativistic quark model

Abstract

Semileptonic and leptonic B decays are analyzed in the framework of the relativistic quark model. Special attention is payed to the decays involving $\tau$ lepton. It is found that the calculated particular decay branching fractions are consistent with available experimental data within error bars. However, the predicted and recently measured ratios $R(D^{(\ast )})$ of the $B\to D^{(\ast )}\tau {\nu }_{\tau }$ and $B\to D^{(\ast )}l{\nu }_l$ branching fractions differ by 1.75$\sigma$ for $R(D)$ and by 2.4$\sigma$ for $R(D^{\ast })$.

arXiv comment6 pages, 2 figures

References in corpus (10)

• Properties of heavy quarkonia and B_c mesons in the relativistic quark model
• On the B to D* tau nu Sensitivity to New Physics
• Exclusive semileptonic and nonleptonic decays of the Bc meson
• Spectroscopy of B_c Mesons in the Relativized Quark Model
• Observation of B+ -> Dbar*0 tau+ nu_tau and Evidence for B+ -> Dbar^0 tau+ nu_tau at Belle
• Relativistic treatment of the decay constants of light and heavy mesons
• Evidence for B- -> tau- nu_bar with a Semileptonic Tagging Method
• Decay constants of the heavy-light mesons from the field correlator method
• New analysis of semileptonic B decays in the relativistic quark model
• Measurement of the Semileptonic Decays B --> D tau- nubar_tau and B --> D* tau- nubar_tau

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• Semileptonic decays of ${\Lambda }_b$ baryons in the relativistic quark model
• Weak decays of $B_s$ mesons to $D_s$ mesons in the relativistic quark model
• Exclusive decays $B\to {\ell }^{-}\bar{\nu }$ and $B\to D^{(\ast )}{\ell }^{-}\bar{\nu }$ in the covariant quark model
• Semileptonic decays $B\to D^{(\ast )}l\nu$ in the perturbative QCD factorization approach
• Probing the R-parity violating supersymmetric effects in the exclusive b\to c\ell^-\barν_\ell decays
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• Study of ${\bar{B}}_s^0\to (D_s^{+},D_s^{\ast +})l^{-}{\bar{\nu }}_l$ decays in the pQCD factorization approach
• A comprehensive study on the semileptonic decay of heavy flavor mesons
• The $B\to D^{(\ast )}l{\nu }_l$ decays in the pQCD approach with the Lattice QCD input