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

Abstract

We study possible New Physics (NP) effects in the exclusive decays ${\bar{B}}^0\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$. We extend the Standard Model (SM) by taking into account right-handed vector (axial), left- and right-handed (pseudo)scalar, and tensor current contributions. The ${\bar{B}}^0\to D^{(\ast )}$ transition form factors are calculated in the full kinematic $q^2$ range by employing a covariant quark model developed by us. We provide constraints on NP operators based on measurements of the ratios of branching fractions $R(D^{(\ast )})\equiv \mathcal{B}({\bar{B}}^0\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau })/\mathcal{B}({\bar{B}}^0\to D^{(\ast )}{\mu }^{-}{\bar{\nu }}_{\mu })$ and consider the effects of these operators on physical observables in different NP scenarios. We also derive the four-fold angular distribution for the cascade decay ${\bar{B}}^0\to D^{\ast +}(\to D^0{\pi }^{+}){\tau }^{-}{\bar{\nu }}_{\tau }$ which allows one to analyze the polarization of the $D^{\ast }$ meson in the presence of NP effects. We discuss several strategies to distinguish between various NP contributions.

arXiv comment31 pages, 10 figures, some corrections made, discussions extended, figures updated, references added; a version to appear in PRD

References in corpus (45)

• Heavy Quark Symmetry
• Evidence for an excess of B -> D(*) Tau Nu decays
• Measurement of the branching ratio of $\bar{B}\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to $\bar{B}\to D^{(\ast )}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with hadronic tagging at Belle
• Measurement of the ratio of branching fractions $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• One Leptoquark to Rule Them All: A Minimal Explanation for $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$
• 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
• Effective field theory approach to $b\to s\ell {\ell }^{(\prime )}$, $B\to K^{(\ast )}\nu \bar{\nu }$ and $B\to D^{(\ast )}\tau \nu$ with third generation couplings
• Vector leptoquark resolution of $R_K$ and $R_{D^{(\ast )}}$ puzzles
• Testing leptoquark models in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• The $B\to D\ell \nu$ form factors at nonzero recoil and $|V_{cb}|$ from $2+1$-flavor lattice QCD
• Explaining B->Dτν, B->D*τνand B->τνin a 2HDM of type III
• $B\to Dl\nu$ Form Factors at Non-Zero Recoil and Extraction of $|V_{cb}|$
• A perturbed lepton-specific two-Higgs-doublet model facing experimental hints for physics beyond the Standard Model
• New physics in the weak interaction of $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Non-abelian gauge extensions for B-decay anomalies
• Sensitivity to charged scalars in $B\to D^{(\ast )}\tau {\nu }_{\tau }$ and $B\to \tau {\nu }_{\tau }$ decays
• B_l4 decays and the extraction of |V_ub|
• B -> D tau nu Branching Ratios: Opportunity for Lattice QCD and Hadron Colliders
• Diagnosing New Physics in $b\to c\tau {\nu }_{\tau }$ decays in the light of the recent BaBar result
• Revisiting the one leptoquark solution to the $R(D^{(\ast )})$ anomalies and its phenomenological implications
• The semileptonic decay Lambda_b -> Lambda_c + tau(-) + antinu_tau in the covariant confined quark model
• On the anomalous enhancement observed in $B\to D^{(\ast )}\tau {\bar{\nu }}_{\tau }$ decays
• Relativistic constituent quark model with infrared confinement
• Generalised helicity formalism, higher moments and the $B\to K_{J_K}(\to K\pi ){\bar{\ell }}_1{\ell }_2$ angular distributions
• The Full $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution and CP violating Triple Products
• The Azimuthal $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution with Tensor Operators
• The two-loop scalar and tensor pentabox graph with light-like legs
• The exclusive rare decays B -> K l(bar) l and B_c -> D(D*) l(bar) l in a relativistic quark model
• Form factors for semileptonic, nonleptonic and rare $B(B_s)$ meson decays
• Optimal-observable analysis of possible new physics in $B\to D^{(\ast )}\tau {\nu }_{\tau }$
• Exclusive decays $B\to {\ell }^{-}\bar{\nu }$ and $B\to D^{(\ast )}{\ell }^{-}\bar{\nu }$ in the covariant quark model
• Polarization effects in the cascade decay Lambda_b -> Lambda(-> p pi-) + J/psi(-> l+ l-) in the covariant confined quark model
• Light baryons and their electromagnetic interactions in the covariant constituent quark model
• Strong and radiative decays of heavy mesons in a covariant model
• On the meson mass spectrum in the covariant confined quark model
• Form factors of the B-S-transitions in the covariant quark model
• Measurement of the $\tau$ lepton polarization in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• Exclusive decays $J/\psi \to D_{(s)}^{(\ast )-}{\ell }^{+}{\nu }_{\ell }$ in a covariant constituent quark model with infrared confinement
• Angular distributions of $\bar{B}\to D^{(\ast )}\ell {\bar{\nu }}_{\ell }$ decays and search of New Physics
• Analyzing $b\to u$ transitions in semileptonic ${\bar{B}}_s\to K^{\ast +}(\to K\pi ){\ell }^{-}{\bar{\nu }}_{\ell }$ decays
• Correlating new physics signals in $B\to D^{(\ast )}\tau {\nu }_{\tau }$ with $B\to \tau {\nu }_{\tau }$
• FaRe: a Mathematica package for tensor reduction of Feynman integrals
• A relativistic quark model with infrared confinement and the tetraquark state
• B => D(*) transitions in a quark model

Cited by in corpus (64)

• The lifetime of the $B_c^{-}$ meson and the anomalies in $B\to D^{(\ast )}\tau \nu$
• Scalar contributions to $b\to c(u)\tau \nu$ transitions
• $R_{D^{(\ast )}}$ anomaly: A possible hint for natural supersymmetry with $R$-parity violation
• $R(D^{(\ast )})$ in a general two Higgs doublet model
• New Physics effect on $B_c\to J/\psi \tau \bar{\nu }$ in relation to the $R_{D^{(\ast )}}$ anomaly
• Excesses of muon $g-2$, $R_{D^{(\ast )}}$, and $R_K$ in a leptoquark model
• Footprints of New Physics in $b\to c\tau \nu$ Transitions
• Explaining the $R_K$ and $R_{D^{(\ast )}}$ anomalies with vector leptoquarks
• Lepton-flavor universality violation in $R_K$ and $R_{D^{(\ast )}}$ from warped space
• New physics solutions for $R_D$ and $R_{D^{\ast }}$
• Implications of new physics in the decays $B_c\to (J/\psi ,{\eta }_c)\tau \nu$
• New Physics in the Visible Final States of $B\to D^{(\ast )}\tau \nu$
• D* polarization as a probe to discriminate new physics in B --> D* tau nubar
• 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
• Charged-Higgs on $R_{D^{(\ast )}}$, $\tau$ polarization, and FBA
• \large\bf $B_c\to (J/\Psi ,{\eta }_c)\tau \nu$ semileptonic decays within Standard model and beyond
• Semileptonic $D_{(s)}$-meson decays in the light of recent data
• Lepton-flavour non-universality of $\bar{B}\to D^{\ast }\ell \bar{\nu }$ angular distributions in and beyond the Standard Model
• $|V_{cb}|$ and $R(D^{(\ast )})$ using lattice QCD and unitarity
• Revisiting R-parity violating interactions as an explanation of the B-physics anomalies
• On lepton flavour universality in semileptonic $B_c\to {\eta }_c,J/\psi$ decays
• Asymmetry Observables and the Origin of $R_{D^{(\ast )}}$ Anomalies
• Revisit to the $b\to c\tau \nu$ transition: in and beyond the SM
• Anomalies in (semi)-leptonic $B$ decays $B^{\pm }\to {\tau }^{\pm }\nu$, $B^{\pm }\to D{\tau }^{\pm }\nu$ and $B^{\pm }\to D^{\ast }{\tau }^{\pm }\nu$, and possible resolution with sterile neutrino
• Probing new physics in semileptonic ${\Lambda }_b$ decays
• Semileptonic Decays of Charmed Mesons to Light Scalar Mesons
• Theoretical description of the decays ${\Lambda }_b\to {\Lambda }^{(\ast )}({\frac{1}{2}}^{\pm },{\frac{3}{2}}^{\pm })+J/\psi$
• Probing a simplified, $W^{\prime }$ model of $R(D^{(\ast )})$ anomalies using $b$-tags, $\tau$ leptons and missing energy
• Beyond $\mathcal{R}(D^{(\ast )})$ with the general 2HDM-III for $b\to c\tau \nu$
• Model independent analysis of $b\to (c,u)\tau \nu$ leptonic and semileptonic decays
• R-parity violating solutions to the $R_{D^{(\ast )}}$ anomaly and their GUT-scale unifications
• Exclusive determinations of $|V_{cb}|$ and $R(D^{\ast })$ through unitarity
• On the Minimal Flavor Violating Leptoquark Explanation of the $R_{D^{(\ast )}}$ Anomaly
• Investigation of Effects of New Physics in $c\to (s,d){\ell }^{+}{\nu }_{\ell }$ Transitions
• Signature of Lepton flavor universality violation in $B_s\to D_s\tau \nu$ semileptonic decays
• Precision Model-Independent Bounds from Global Analysis of $b\to c\ell \nu$ Form Factors
• Decay $D\to K^{(\ast )}{\ell }^{+}{\nu }_{\ell }$ in covariant quark model
• Study of $B_s\to {\ell }^{+}{\ell }^{-}\gamma$ decays in covariant quark model
• $|V_{cb}|$, Lepton Flavour Universality and $SU(3{)}_F$ symmetry breaking in $B_s\to D_s^{(\ast )}\ell {\nu }_{\ell }$ decays through unitarity and lattice QCD
• Phenomenology of flavorful composite vector bosons in light of $B$ anomalies
• $B\to D^{(\ast )}\tau {\nu }_{\tau }$ in the 2HDM with an anomalous $\tau$ coupling
• $b\to c\ell \nu$ anomalies in light of extended scalar sectors
• Tests of the Standard Model in $B\to D\ell {\nu }_{\ell }$, $B\to D^{\ast }\ell {\nu }_{\ell }$ and $B_c\to J/\psi \ell {\nu }_{\ell }$
• Form factors and branching fraction calculations for $B_s\to D_s^{(\ast )}{\ell }^{+}{\nu }_{\ell }$ in view of LHCb observation
• Model-Independent Prediction of $R({\eta }_c)$
• Impact of vector new physics couplings on $B_s\to (K,K^{\ast })\tau \nu$ and $B\to \pi \tau \nu$ decays
• Measurement of the $D^{\ast }$ longitudinal polarization in $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ decays
• Detailed Study of the Decay Lambda_b --> Lambda_c tau {\bar ν}_τ
• Probing new physics in semileptonic ${\Sigma }_b$ and ${\Omega }_b$ decays
• $D^{\ast }$ Polarization as an Additional Constraint on New Physics in the $b\to c\tau {\bar{\nu }}_{\tau }$ Transition
• Form-factor-independent test of lepton universality in semileptonic heavy meson and baryon decays
• Weak nonleptonic decays of vector B-mesons
• Analyzing lepton flavor universality in the decays ${\Lambda }_b\to {\Lambda }_c^{(\ast )}({\frac{1}{2}}^{\pm },{\frac{3}{2}}^{-})+\ell {\bar{\nu }}_{\ell }$
• Predictions of $B_c\to (D,D^{\ast })l\nu$ decay observables in the standard model
• $B\to K^{(\ast )}\nu \bar{\nu }$ in covariant confined quark model
• A new angle on an old problem: Helicity approach to neutron beta decay in the Standard Model
• Angular distribution as an effective probe of new physics in semi-hadronic three-body meson decays
• $B$ anomalies in the nonminimal universal extra dimension model
• Anomalies in Weak Decays of Hadrons Containing a b Quark
• Model Dependent Analysis of D_((s))^+ arrows η^((')) l^+ ν_l Decays in Beyond Standard Model
• Weak Annihilation Contribution to Angular Observables in $B_c^{+}\to D^{\ast +}{\ell }^{+}{\ell }^{-}$ Decays
• Helicity amplitudes in the $\bar{B}\to D^{\ast }{\bar{\nu }}_{\tau }\tau$ decay with $V-A$ breaking in the quark sector
• ${\eta }_c$ leading-twist distribution amplitude and the $B_c\to {\eta }_c\ell {\bar{\nu }}_{\ell }$ semileptonic decays using QCD Sum Rules
• Radiative transitions of charmonium states in the covariant confined quark model