Probing New Physics with $q^2$ distributions in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$

Abstract

Recent experimental results for the ratios of the branching fractions of the decays $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ and $\bar{B}\to D^{(\ast )}\mu \bar{\nu }$ came as a surprise and lead to a discussion of possibility of testing New Physics beyond the Standard Model through these modes. We show that these decay channels can provide us with good constraints on New Physics and several New Physics cases are favored by the present experimental data. In order to discriminate various New Physics scenarios, we examine the $q^2$ distributions and estimate the sensitivity of this potential measurement at the SuperKEKB/Belle II experiment.

14 pages

References in corpus (7)

• On the B to D* tau nu Sensitivity to New Physics
• Implications of lepton flavor universality violations in B decays
• New physics in the weak interaction of $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• B -> D tau nu Branching Ratios: Opportunity for Lattice QCD and Hadron Colliders
• Charged-Higgs effects in a new B -> D tau nu differential decay distribution
• The Azimuthal $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution with Tensor Operators
• CP violation in $B\to D\tau {\nu }_{\tau }$ using multi-pion tau decays

Cited by in corpus (16)

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• Renormalization-group evolution of new physics contributions to (semi)leptonic meson decays
• New Physics effect on $B_c\to J/\psi \tau \bar{\nu }$ in relation to the $R_{D^{(\ast )}}$ anomaly
• Explaining the $R_K$ and $R_{D^{(\ast )}}$ anomalies with vector leptoquarks
• The role of the $S_3$ GUT leptoquark in flavor universality and collider searches
• ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay in the Standard Model and with New Physics
• B-meson charged current anomalies: the post-Moriond status
• Phenomenology of $b\to c\tau \bar{\nu }$ decays in a scalar leptoquark model
• A Measurable Angular Distribution for $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ Decays
• Lepton Flavor Universality tests through angular observables of $\overline{B}\to D^{(\ast )}\ell \overline{\nu }$ decay modes
• Unified resolution of the $R(D)$ and $R(D^{\ast })$ anomalies and the lepton flavor violating decay $h\to \mu \tau$
• Probing new physics in semileptonic ${\Sigma }_b$ and ${\Omega }_b$ decays
• $b\to c\tau \bar{\nu }$ decays in supersymmetry with $R$-parity violation
• Probing the R-parity violating supersymmetric effects in $B_c\to J/\psi {\ell }^{-}{\bar{\nu }}_{\ell },{\eta }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ decays