On the anomalous enhancement observed in $B\to D^{(\ast )}\tau {\bar{\nu }}_{\tau }$ decays

Abstract

The BaBar measurements of the ratios $\mathcal{R}(D^{(\ast )})=\frac{\mathcal{B}(B\to D^{(\ast )}\tau {\bar{\nu }}_{\tau })}{\mathcal{B}(B\to D^{(\ast )}\mu {\bar{\nu }}_{\mu })}$ deviate from the standard model expectation, while new results on the purely leptonic $B\to \tau {\bar{\nu }}_{\tau }$ mode show a better consistency with the standard model, within the uncertainties. In a new physics scenario, one possibility to accomodate these two experimental facts consists in considering an additional tensor operator in the effective weak hamiltonian. We study the effects of such an operator in a set of observables, in semileptonic $B\to D^{(\ast )}$ modes as well as in semileptonic $B$ and $B_s$ decays to excited positive parity charmed mesons.

LaTeX, 18 pages, 10 figures. Comparison with experimental spectra added. Accepted for publication in Physical Review D

References in corpus (9)

• 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 $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Anatomy of New Physics in B-Bbar mixing
• Evidence for B- -> tau- nu_bar with a Semileptonic Tagging Method
• Measurement of the form factors of the decay B0 -> D*- ell+ nu and determination of the CKM matrix element |Vcb|
• B decay anomalies in an effective theory
• Proposal to study $B_s\to {\bar{D}}_{sJ}$ transitions
• Unity of elementary particles and forces for the third family

Cited by in corpus (104)

• Physics of leptoquarks in precision experiments and at particle colliders
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• Flavor-phenomenology of two-Higgs-doublet models with generic Yukawa structure
• Testing leptoquark models in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Confronting lepton flavor universality violation in B decays with high-$p_T$ tau lepton searches at LHC
• Simultaneous Explanation of the $R_K$ and $R(D^{(\ast )})$ Puzzles
• Flavor models for $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• The lifetime of the $B_c^{-}$ meson and the anomalies in $B\to D^{(\ast )}\tau \nu$
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ with one-prong hadronic $\tau$ decays at Belle
• Scalar contributions to $b\to c(u)\tau \nu$ transitions
• Renormalization-group evolution of new physics contributions to (semi)leptonic meson decays
• $R_{D^{(\ast )}}$ anomaly: A possible hint for natural supersymmetry with $R$-parity violation
• $R(D^{(\ast )})$ in a general two Higgs doublet model
• Phenomenology of an $SU(2)\times SU(2)\times U(1)$ model with lepton-flavour non-universality
• Minimally flavored colored scalar in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ and the mass matrices constraints
• New Physics effect on $B_c\to J/\psi \tau \bar{\nu }$ in relation to the $R_{D^{(\ast )}}$ anomaly
• The semileptonic decay Lambda_b -> Lambda_c + tau(-) + antinu_tau in the covariant confined quark model
• Phenomenology of ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ using lattice QCD calculations
• 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 $R_{D^{\ast }}$
• The Full $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution and CP violating Triple Products
• ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay in the Standard Model and with New Physics
• 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
• Role of Tensor operators in $R_K$ and $R_{K^{\ast }}$
• LHCb anomaly and $B$ physics in flavored Z${}^{\prime }$ models with flavored Higgs doublets
• New Physics in the Visible Final States of $B\to D^{(\ast )}\tau \nu$
• The Azimuthal $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution with Tensor Operators
• D* polarization as a probe to discriminate new physics in B --> D* tau nubar
• Probing New Physics with $q^2$ distributions in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• $R(D^{(\ast )})$ from $W^{\prime }$ and right-handed neutrinos
• $D^{\ast }$ polarization vs. $R_{D^{(\ast )}}$ anomalies in the leptoquark models
• Charged-Higgs on $R_{D^{(\ast )}}$, $\tau$ polarization, and FBA
• 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
• Semitauonic $b$-hadron decays: A lepton flavor universality laboratory
• Challenges in Semileptonic B Decays
• \large\bf $B_c\to (J/\Psi ,{\eta }_c)\tau \nu$ semileptonic decays within Standard model and beyond
• LHC constraints and prospects for $S_1$ scalar leptoquark explaining the $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ anomaly
• ${\Lambda }_b\to ({\Lambda }_c,p)\tau \nu$ decays within standard model and beyond
• Effective theory approach to new physics in $b\to u$ and $b\to c$ leptonic and semileptonic decays
• Implications of scalar and tensor explanations of $R_{D^{(\ast )}}$
• Lepton-flavour non-universality of $\bar{B}\to D^{\ast }\ell \bar{\nu }$ angular distributions in and beyond the Standard Model
• Exclusive decays $B\to {\ell }^{-}\bar{\nu }$ and $B\to D^{(\ast )}{\ell }^{-}\bar{\nu }$ in the covariant quark model
• Optimal-observable analysis of possible new physics in $B\to D^{(\ast )}\tau {\nu }_{\tau }$
• Semileptonic $B_{(s)}$ decays to excited charmed mesons with $e,\mu ,\tau$ and searching for new physics with $R(D^{\ast \ast })$
• Looking for possible new physics in $B\to D^{(\ast )}\tau {\nu }_{\tau }$ in light of recent data
• New physics in the kinematic distributions of $\bar{B}\to D^{(\ast )}{\tau }^{-}(\to {\ell }^{-}{\bar{\nu }}_{\ell }{\nu }_{\tau }){\bar{\nu }}_{\tau }$
• 'Bs --> Ds l nu' near zero recoil in and beyond the Standard Model
• Tension in the inclusive versus exclusive determinations of $|V_{cb}|$: a possible role of new physics
• 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
• Model independent analysis of semileptonic $B$ decays to $D^{\ast \ast }$ for arbitrary new physics
• Probing new physics in semileptonic ${\Lambda }_b$ decays
• Inclusive Semitauonic $B$ Decays to Order $\mathcal{O}({\Lambda }_{QCD}^3/m_b^3)$
• Probing a simplified, $W^{\prime }$ model of $R(D^{(\ast )})$ anomalies using $b$-tags, $\tau$ leptons and missing energy
• Inclusive semileptonic ${\Lambda }_b$ decays in the Standard Model and beyond
• Probing New Physics with $\bar{B}\to \rho (770){\ell }^{-}{\bar{\nu }}_{\ell }$ and $\bar{B}\to a_1(1260){\ell }^{-}{\bar{\nu }}_{\ell }$
• 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
• CP violation in $B\to D\tau {\nu }_{\tau }$ using multi-pion tau decays
• 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
• Signature of Lepton flavor universality violation in $B_s\to D_s\tau \nu$ semileptonic decays
• A Measurable Angular Distribution for $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ Decays
• Model-independent method for measuring the angular coefficients of $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ decays
• CP Violation in ${\bar{B}}^0\to D^{\ast +}{\mu }^{-}{\bar{\nu }}_{\mu }$
• Symmetries in $B\to D^{\ast }\ell \nu$ angular observables
• The $B\to D^{(\ast )}l{\nu }_l$ decays in the pQCD approach with the Lattice QCD input
• A Complete Framework for Tau Polarimetry in $B\to D^{(\ast )}\tau \nu$ Decays
• Lepton Flavor Universality tests through angular observables of $\overline{B}\to D^{(\ast )}\ell \overline{\nu }$ decay modes
• $B\to D^{(\ast )}\tau {\nu }_{\tau }$ in the 2HDM with an anomalous $\tau$ coupling
• Study of semileptonic ${\bar{B}}^{\ast }\to P\ell {\bar{\nu }}_{\ell }$ decays
• Rare semileptonic $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ decays in RS${}_c$ model
• Role of $B_c^{+}\to B_{s,d}^{(\ast )}\bar{\ell }{\nu }_{\ell }$ in the Standard Model and in the search for BSM signals
• Semileptonic and leptonic $B$ decays, circa 2016
• Remarks on the Standard Model predictions for $R(D)$ and $R(D^{\ast })$
• Charged Higgs boson contribution to $B_q^{-}\to \ell \bar{\nu }$ and $\bar{B}\to (P,V)\ell \bar{\nu }$ in a generic two-Higgs doublet model
• Impact of vector new physics couplings on $B_s\to (K,K^{\ast })\tau \nu$ and $B\to \pi \tau \nu$ decays
• Implication of $b\to c\tau \nu$ flavor anomalies on $B_s\to D_s^{\ast }\tau \nu$ decay observables
• Investigation of the semileptonic transition of the $B$ into the orbitally excited charmed tensor meson
• Progress on semi-leptonic $B_{(s)}$ decays
• New physics footprints in the angular distribution of $B_s\to D_s^{\ast }(\to D_s\gamma ,D_s\pi )\tau \nu$ decays
• Relations among $B_c\to J/\psi ,{\eta }_c$ form factors
• Detailed Study of the Decay Lambda_b --> Lambda_c tau {\bar ν}_τ
• $D^{\ast }$ Polarization as an Additional Constraint on New Physics in the $b\to c\tau {\bar{\nu }}_{\tau }$ Transition
• B-Meson Decays into Final States with a tau Lepton
• Measuring CP violation in $b\to c{\tau }^{-}{\bar{\nu }}_{\tau }$ using excited charm mesons
• Supersymmetric SU(5) Grand Unification for a Post Higgs Boson Era
• $1/m$ Corrections for Orbitally Excited Heavy Mesons and the $1/2$ - $3/2$ Puzzle
• Status of $|V_{cb}|$ and $|V_{ub}|$ CKM matrix elements
• Predictions of $B_c\to (D,D^{\ast })l\nu$ decay observables in the standard model
• Baryonic heavy-to-light form factors induced by tensor current in light-front approach
• Semileptonic $B_c$ decays to $P-$wave charmonium and the nature of ${\chi }_{c1}(3872)$
• Physical observables in the decay ${\Lambda }_b\to {\Lambda }_c(\to \Lambda +\pi )+{\tau }^{-}+{\bar{\nu }}_{\tau }$
• Model independent investigation of rare semileptonic b \to u l \barν_l decay processes
• Relations between $b\to c\tau \nu$ Decay Modes in Scalar Models
• $B$ anomalies in the nonminimal universal extra dimension model
• Corrections to $R_D$ and $R_{D^{\ast }}$ in the BLMSSM
• Angular analysis of $\bar{B}\to D_2^{\ast }(\to D\pi )\ell \bar{\nu }$ decay and new physics
• Delving into new physics in semileptonic $b\to c\tau \bar{\nu }$ transitions
• Probing New Physics with heavy hadron decays
• Semileptonic $B\to \bar{D}$ transition in nuclear medium
• Semileptonic $B_s\to D_{s2}^{\ast }(2573)\ell {\bar{\nu }}_{\ell }$ transition in QCD