Measurement of the ratio of the $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ and $B^0\to D^{\ast -}{\mu }^{+}{\nu }_{\mu }$ branching fractions using three-prong $\tau$-lepton decays

Abstract

The ratio of branching fractions $\mathcal{R}(D^{\ast -})\equiv \mathcal{B}(B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau })/\mathcal{B}(B^0\to D^{\ast -}{\mu }^{+}{\nu }_{\mu })$ is measured using a data sample of proton-proton collisions collected with the LHCb detector at center-of-mass energies of 7 and 8 Tev, corresponding to an integrated luminosity of 3 fb${}^{-1}$. For the first time $\mathcal{R}(D^{\ast -})$ is determined using the $\tau$ lepton decays with three charged pions in the final state. The $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ yield is normalized to that of the $B^0\to D^{\ast -}{\pi }^{+}{\pi }^{-}{\pi }^{+}$ mode, providing a measurement of $\mathcal{B}(B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau })/\mathcal{B}(B^0\to D^{\ast -}{\pi }^{+}{\pi }^{-}{\pi }^{+})=1.97\pm 0.13\pm 0.18$, where the first uncertainty is statistical and the second systematic. The value of $\mathcal{B}(B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau })=(1.42\pm 0.094\pm 0.129\pm 0.054)\%$ is obtained, where the third uncertainty is due to the limited knowledge of the branching fraction of the normalization mode. Using the well-measured branching fraction of the $B^0\to D^{\ast -}{\mu }^{+}{\nu }_{\mu }$ decay, a value of $\mathcal{R}(D^{\ast -})=0.291\pm 0.019\pm 0.026\pm 0.013$ is established, where the third uncertainty is due to the limited knowledge of the branching fractions of the normalization and $B^0\to D^{\ast -}{\mu }^{+}{\nu }_{\mu }$ modes. This measurement is in agreement with the Standard Model prediction and with previous results.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-017.html

References in corpus (31)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• LHCb Detector Performance
• PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays
• Evidence for an excess of B -> D(*) Tau Nu decays
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• 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 $\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\tau }^{-}{\overline{\nu }}_{\tau })/\mathcal{B}({\overline{B}}^0\to D^{\ast +}{\mu }^{-}{\overline{\nu }}_{\mu })$
• The LHCb Trigger and its Performance in 2011
• Semileptonic Meson Decays in the Quark Model: An Update
• 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
• Decay Chain Fitting with a Kalman Filter
• Model independent constraints on leptoquarks from rare processes
• Dispersive Bounds on the Shape of B -> D^(*) l nu Form Factors
• 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
• Efficient, reliable and fast high-level triggering using a bonsai boosted decision tree
• Test of Lepton Flavor Universality by the measurement of the $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ branching fraction using three-prong $\tau$ decays
• Combined analysis of semileptonic $B$ decays to $D$ and $D^{\ast }$: $R(D^{(\ast )})$, $|V_{cb}|$, and new physics
• Revisiting $B\to D\ell \nu$
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• Universal Interface of TAUOLA Technical and Physics Documentation
• Charged Higgs Effects on Exclusive Semi-tauonic $\bbox{B}$ Decays
• Resonance Chiral Lagrangian Currents and Experimental Data for ${\tau }^{-}\to {\pi }^{-}{\pi }^{-}{\pi }^{+}{\nu }_{\tau }$
• Observation of B+ to Lambda Lambdabar K+
• Invariant mass spectra of ${\tau }^{-}\to h^{-}{h}^{-}{h}^{+}\nu$ decays
• Study of B0 -> D*- pi+ pi- pi+ and B0 -> D*- K+ pi- pi+ decays
• Measurement of the B^0 -> D^*- pi^+ pi^- pi^+ branching fraction
• Observation of $B^0\to D^{\ast -}(5\pi {)}^{+}$, $B^{+}\to D^{\ast -}(4\pi {)}^{++}$ and $B^{+}\to {\bar{D}}^{\ast 0}(5\pi {)}^{+}$

Cited by in corpus (223)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Test of Lepton Flavor Universality by the measurement of the $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ branching fraction using three-prong $\tau$ decays
• Measurement of the ratio of branching fractions $\mathcal{B}(B_c^{+}\to J/\psi {\tau }^{+}{\nu }_{\tau })$/$\mathcal{B}(B_c^{+}\to J/\psi {\mu }^{+}{\nu }_{\mu })$
• B-decay discrepancies after Moriond 2019
• Review of Lepton Universality tests in B decays
• Detecting and Studying High-Energy Collider Neutrinos with FASER at the LHC
• Maximal Flavour Violation: a Cabibbo mechanism for leptoquarks
• Axial-vector exchange contribution to the hadronic light-by-light piece of the muon anomalous magnetic moment
• The Mono-Tau Menace: From $B$ Decays to High-$p_T$ Tails
• Impact of polarization observables and $B_c\to \tau \nu$ on new physics explanations of the $b\to c\tau \nu$ anomaly
• Pati-Salam explanations of the B-meson anomalies
• Combined explanations of B-physics anomalies: the sterile neutrino solution
• Addendum to "Impact of polarization observables and $B_c\to \tau \nu$ on new physics explanations of the $b\to c\tau \nu$ anomaly"
• Footprints of New Physics in $b\to c\tau \nu$ Transitions
• Low-energy phenomenology of scalar leptoquarks at one-loop accuracy
• $B_s\to D_s\ell \nu$ Form Factors for the full $q^2$ range from Lattice QCD with non-perturbatively normalized currents
• Large long-distance contributions to the electric dipole moments of charged leptons in the standard model
• Flavor Physics and Flavor Anomalies in Minimal Fundamental Partial Compositeness
• Semileptonic form factors for $B\to D^{\ast }\ell \nu$ at nonzero recoil from 2 + 1-flavor lattice QCD
• Third-family quark-lepton unification with a fundamental composite Higgs
• Reinterpretation of LHC Results for New Physics: Status and Recommendations after Run 2
• Addressing $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$, muon $g-2$ and ANITA anomalies in a minimal $R$-parity violating supersymmetric framework
• ReDecay: A novel approach to speed up the simulation at LHCb
• Precision predictions for scalar leptoquark pair-production at hadron colliders
• A Model of Muon Anomalies
• Correlating $h\to {\mu }^{+}{\mu }^{-}$ to the Anomalous Magnetic Moment of the Muon via Leptoquarks
• $R(J/\psi )$ and $B_c^{-}\to J/\psi {\ell }^{-}{\bar{\nu }}_{\ell }$ Lepton Flavor Universality Violating Observables from Lattice QCD
• Measurement of the ratios of branching fractions $\mathcal{R}(D^{\ast })$ and $\mathcal{R}(D^0)$
• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• Challenges in Semileptonic B Decays
• Quark level and hadronic contributions to the electric dipole moment of charged leptons in the standard model
• Test of lepton flavour universality using $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ decays with hadronic $\tau$ channels
• Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Flavor hierarchies, flavor anomalies, and Higgs mass from a warped extra dimension
• Addressing the ${\mathbf{R}}_{D^{(\ast )}}$ anomalies with an ${\mathbf{S}}_1$ leptoquark from $\mathbf{SO}(10)$ grand unification
• Searching for Lepton Flavour (Universality) Violation and Collider Signals from a Singly-Charged Scalar Singlet
• Combined Constraints on First Generation Leptoquarks
• $|V_{cb}|$ and $R(D^{(\ast )})$ using lattice QCD and unitarity
• B-meson charged current anomalies: the post-Moriond status
• First-Generation New Physics in Simplified Models: From Low-Energy Parity Violation to the LHC
• The role of right-handed neutrinos in $b\to c\tau \bar{\nu }$ anomalies
• Tau Neutrinos in the Next Decade: from GeV to EeV
• Unified explanation of flavor anomalies, radiative neutrino mass and ANITA anomalous events in a vector leptoquark model
• Lattice QCD form factor for $B_s\to D_s^{\ast }l\nu$ at zero recoil with non-perturbative current renormalisation
• Hunting scalar leptoquarks with boosted tops and light leptons
• Flavour alignment in multi-Higgs-doublet models
• Flavor Anomalies in Heavy Quark Decays
• Combined Explanation of the $Z\to b\bar{b}$ Forward-Backward Asymmetry, the Cabibbo Angle Anomaly, $\tau \to \mu \nu \nu$ and $b\to s{\ell }^{+}{\ell }^{-}$ Data
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• Unitarity Bounds for Semileptonic Decays in Lattice QCD
• Anomalies in Particle Physics
• $b\to c\tau \nu$ Transitions in the Standard Model Effective Field Theory
• Charged current $b\to c\tau {\bar{\nu }}_{\tau }$ anomalies in a general $W^{\prime }$ boson scenario
• Revisit to the $b\to c\tau \nu$ transition: in and beyond the SM
• Test of the $R(D^{(\ast )})$ anomaly at the LHC
• Investigation of Effects of New Physics in ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay
• Impact of ${\Lambda }_b\to {\Lambda }_c\tau \nu$ measurement on New Physics in $b\to cl\nu$ transitions
• Solutions to $R_D$-$R_{D^{\ast }}$ in light of Belle 2019 data
• Inclusive nonresonant multilepton probes of new phenomena at $\sqrt{s}=$ 13 TeV
• Constraints for the semileptonic $B\to D^{(\ast )}$ form factors from lattice QCD simulations of two-point correlation functions
• Measurements of the branching fractions of the semileptonic decays ${\Xi }_c^0\to {\Xi }^{-}{\ell }^{+}{\nu }_{\ell }$ and the asymmetry parameter of ${\Xi }_c^0\to {\Xi }^{-}{\pi }^{+}$
• Combined explanation of $W$-mass, muon $g-2$, $R_{K^{(\ast )}}$ and $R_{D^{(\ast )}}$ anomalies in a singlet-triplet scalar leptoquark model
• Bottom-Flavored Mono-Tau Tails at the LHC
• Precise limits on the charge-$2/3$ $U_1$ vector leptoquark
• Test of the universality of $\tau$ and $\mu$ lepton couplings in $W$-boson decays from $t\bar{t}$ events with the ATLAS detector
• Anatomy of kaon decays and prospects for lepton flavour universality violation
• Observation of the leptonic decay $D^{+}\to {\tau }^{+}{\nu }_{\tau }$
• Lepton flavor universality violation in semileptonic tree level weak transitions
• Correlating Tauonic B Decays to the Neutron EDM via a Scalar Leptoquark
• Complete Lagrangian and Set of Feynman Rules for Scalar Leptoquarks
• Inclusive semileptonic ${\Lambda }_b$ decays in the Standard Model and beyond
• Resonant third-generation leptoquark signatures at the Large Hadron Collider
• Global fit to $b\to c\tau \nu$ anomalies as of Spring 2024
• Phenomenology of $b\to c\tau \bar{\nu }$ decays in a scalar leptoquark model
• Probing New Physics with $\bar{B}\to \rho (770){\ell }^{-}{\bar{\nu }}_{\ell }$ and $\bar{B}\to a_1(1260){\ell }^{-}{\bar{\nu }}_{\ell }$
• R-parity violating solutions to the $R_{D^{(\ast )}}$ anomaly and their GUT-scale unifications
• Flavor anomalies from asymptotically safe gravity
• Searching for New Physics with $b\bar{b}{\ell }^{+}{\ell }^{-}$ Contact Interactions
• Resolution of $R_D$/$R_{D^{\ast }}$ puzzle
• Review of Semileptonic $B$ Anomalies
• Non-resonant new physics search at the LHC for the $b\to c\tau \nu$ anomalies
• On the Minimal Flavor Violating Leptoquark Explanation 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
• The Forward-Backward Asymmetry in $B\to D^{\ast }\ell \nu$: One more hint for Scalar Leptoquarks?
• Analysis of $B_c\to \tau {\nu }_{\tau }$ at CEPC
• Precision Model-Independent Bounds from Global Analysis of $b\to c\ell \nu$ Form Factors
• Revisiting the $B$-physics anomalies in $R$-parity violating MSSM
• Boosting vector leptoquark searches with boosted tops
• From B-meson anomalies to Kaon physics with scalar leptoquarks
• Further tests of lepton flavour universality from the charged lepton energy distribution in $b\to c$ semileptonic decays: The case of ${\Lambda }_b\to {\Lambda }_c\ell {\bar{\nu }}_{\ell }$
• Hints of Natural Supersymmetry in Flavor Anomalies?
• Scalar Leptoquarks, Baryon Number Violation and Pati-Salam Symmetry
• Semileptonic decays $B/B_s\to (D^{(\ast )},D_s^{(\ast )})l{\nu }_l$ in the PQCD approach with the lattice QCD input
• Model-Independent Determination of $B_c^{+}\to {\eta }_c{\ell }^{+}\nu$ Form Factors
• Discriminating $B\to D^{\ast }\ell \nu$ form factors via polarization observables and asymmetries
• First test of Lepton Flavor Universality in the charmed baryon decays ${\Omega }_c^0\to {\Omega }^{-}{\ell }^{+}{\nu }_{\ell }$ using data of the Belle experiment
• Collider signature of $U_1$ Leptoquark and constraints from $b\to c$ observables
• Studying the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies and $(g-2{)}_{\mu }$ in $R$-parity violating MSSM framework with the inverse seesaw mechanism
• Decays of charged $B$-mesons into three charged leptons and a neutrino
• Hadron and lepton tensors in semileptonic decays including new physics
• New flavor physics in di- and tri-lepton events from single-top at the LHC and beyond
• Gravitational Wave Signatures of Lepton Universality Violation
• Towards a viable scalar interpretation of $R_{D^{(\ast )}}$
• Muon $g-2$ in a $U(1)$-symmetric Two-Higgs-Doublet Model
• Lepton Flavor Universality tests through angular observables of $\overline{B}\to D^{(\ast )}\ell \overline{\nu }$ decay modes
• A Complete Framework for Tau Polarimetry in $B\to D^{(\ast )}\tau \nu$ Decays
• Correlating Non-Resonant Di-Electron Searches at the LHC to the Cabibbo-Angle Anomaly and Lepton Flavour Universality Violation
• Coup de grace to the charged Higgs solution of $P_5^{\prime }$ and $R_{D^{(\ast )}}$ discrepancies
• Probing effects of new physics in ${\Lambda }_b^0\to {\Lambda }_c^{+}{\mu }^{-}{\bar{\nu }}_{\mu }$ decays
• Analysing the charged scalar boson contribution to the charged-current $B$ meson anomalies
• Combined explanations of $B$-physics anomalies, $(g-2{)}_{e,\mu }$ and neutrino masses by scalar leptoquarks
• Semileptonic $B_c\to {\eta }_c,J/\psi$ transitions
• Scalar leptoquark pair production at the LHC: precision predictions in the era of flavour anomalies
• A test of light-lepton universality in the rates of inclusive semileptonic $B$-meson decays at Belle II
• ${\Lambda }_b\to {\Lambda }_c$ Form Factors from QCD Light-Cone Sum Rules
• Search for the decay $B^0\to K^{\ast 0}{\tau }^{+}{\tau }^{-}$ at the Belle experiment
• Multi-lepton probes of new physics and lepton-universality in top-quark interactions
• Prospects for $B_c^{+}$ and $B^{+}\to {\tau }^{+}{\nu }_{\tau }$ at FCC-ee
• Flavor Non-universal Vector Leptoquark Imprints in $K\to \pi \nu \bar{\nu }$ and $\Delta F=2$ Transitions
• Anomalies in B mesons decays: A phenomenological approach
• 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
• Testing Leptoquark and $Z^{\prime }$ Models via $B\to K_1(1270,1400){\mu }^{+}{\mu }^{-}$ Decays
• Implication of $R_{D^{(\ast )}}$ anomalies on semileptonic decays of ${\Sigma }_b$ and ${\Omega }_b$ baryons
• Phenomenology of TeV-scale scalar Leptoquarks in the EFT
• Scotogenic Dirac neutrino mass models embedded with leptoquarks: one pathway to address the flavor anomalies and the neutrino masses together
• Signatures of complex new physics in $b\to c\tau \bar{\nu }$ transitions
• Observation of the decay $D^0\to K^{-}{\pi }^{+}{e}^{+}{e}^{-}$
• $\bar{B}\to D^{(\ast )}\ell \bar{X}$ decays in effective field theory with massive right-handed neutrinos
• Some results on Lepton Flavour Universality Violation
• Addendum to: Combined Constraints on First Generation Leptoquarks
• Lepton flavour violation in rare ${\Lambda }_b$ decays
• Revisiting mono-$\tau$ tails at the LHC
• Implication of $b\to c\tau \nu$ flavor anomalies on $B_s\to D_s^{\ast }\tau \nu$ decay observables
• Study of the Decay $D_s^{+}\to {\pi }^{+}{\pi }^{+}{\pi }^{-}\eta$ and Observation of the W-annihilation Decay $D_s^{+}\to a_0(980{)}^{+}{\rho }^0$
• Scrutinizing New Physics in Semi-leptonic $B_c\to J/\psi \tau \nu$ Decay
• Semileptonic decays of $B_c$ meson to $P$-wave charmonium states
• 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
• Measurement of the $D^{\ast }$ longitudinal polarization in $B^0\to D^{\ast -}{\tau }^{+}{\nu }_{\tau }$ decays
• First Measurement of the Absolute Branching Fraction of $\Lambda \to p{\mu }^{-}{\bar{\nu }}_{\mu }$
• ${\bar{B}}_c\to {\eta }_c$, ${\bar{B}}_c\to J/\psi$ and $\bar{B}\to D^{(\ast )}$ semileptonic decays including new physics
• Relativistic calculations of $R(D^{(\ast )})$, $R(D_s^{(\ast )})$, $R({\eta }_c)$ and $R(J/\psi )$
• Muon $(g-2)$ and Flavor Puzzles in the $U(1{)}_X^{}$-gauged Leptoquark Model
• The weak $B$, $B_s$ and $B_c$ decays to radially excited states
• New physics effects on ${\Lambda }_b\to {\Lambda }_c^{\ast }\tau {\bar{\nu }}_{\tau }$ decays
• Measuring CP violation in $b\to c{\tau }^{-}{\bar{\nu }}_{\tau }$ using excited charm mesons
• $b\to c\tau \bar{\nu }$ decays in supersymmetry with $R$-parity violation
• Probing New Physics Signals with Symmetry-Restored Yukawa Textures
• High $p_T$ correlated tests of lepton universality in lepton(s) + jet(s) processes; an EFT analysis
• Implications for the $\Delta A_{FB}$ anomaly in ${\bar{B}}^0\to D^{\ast +}{\ell }^{-}\bar{\nu }$ using a new Monte Carlo Event Generator
• Time-reversal asymmetries in ${\Lambda }_b$ semileptonic decays
• Interplay of the charged Higgs effects in $R_{D^{(\ast )}}$, $b\to s{\ell }^{+}{\ell }^{-}$ and $W$-mass
• A Light shed on Lepton Flavor Universality in B decays
• The ratio $\mathcal{R}(D_s)$ for $B_s\to D_s\ell {\nu }_{\ell }$ by using the QCD light-cone sum rules within the framework of heavy quark effective field theory
• Measurement of the relative $B^{-}\to D^0/D^{\ast 0}/D^{\ast \ast 0}{\mu }^{-}{\overline{\nu }}_{\mu }$ branching fractions using $B^{-}$ mesons from $\overline{B}{}_{s2}^{\ast 0}$ decays
• Scouring meson decays for true muonium
• RooHammerModel: interfacing the HAMMER software tool with the HistFactory package
• Improved measurement of the branching fraction of $D_s^{+}\to {\mu }^{+}{\nu }_{\mu }$
• Tests of light-lepton universality in angular asymmetries of $B^0\to D^{\ast -}\ell \nu$ decays
• Perspectives and Outlook from HEP Window on the Universe
• Search for heavy particles in the $b$-tagged dijet mass distribution with additional $b$-tagged jets in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS experiment
• Semileptonic Decay of $B_c$ to ${\eta }_c$ and $J/\psi$ on the Light Front
• Precision measurement of the $\mathcal{B}({\rm Y}(3S)\to {\tau }^{+}{\tau }^{-})/\mathcal{B}({\rm Y}(3S)\to {\mu }^{+}{\mu }^{-})$ ratio
• New physics in the angular distribution of $B_c^{-}\to J/\psi (\to {\mu }^{+}{\mu }^{-}){\tau }^{-}(\to {\pi }^{-}{\nu }_{\tau }){\bar{\nu }}_{\tau }$ decay
• A comprehensive study of vector leptoquark with $U(1{)}_{B_3-L_2}$ on the $B$-meson and Muon g-2 anomalies
• Radiative Semileptonic $\bar{B}$ Decays
• Simplified models of vector $SU(4)$ leptoquarks at the TeV
• Extra gauge bosons and lepton flavor universality violation in ${\rm Y}$ and $B$ meson decays
• Rare decays of b hadrons
• Using Machine Learning techniques in phenomenological studies in flavour physics
• Impact of $b\to c$ measurements on ${\Lambda }_b\to p\tau \bar{\nu }$ decay in $U_1$ leptoquark model
• Singlet vector leptoquark model facing recent LHCb and BABAR measurements
• Measurement of the absolute branching fraction of the inclusive decay $D_s^{+}\to {\pi }^{+}{\pi }^{+}{\pi }^{-}X$
• Search for opposite sign muon-tau pair and a b-jet at LHC in the context of flavor anomalies
• Analysis of $b\to c\tau {\bar{\nu }}_{\tau }$ anomalies using weak effective Hamiltonian with complex couplings
• Search for pair production of scalar and vector leptoquarks decaying to muons and bottom quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Test of lepton flavor universality in semileptonic B${}_{\text{c}}^{+}$ meson decays in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Lepton nonuniversality anomalies and implications
• Clifford-based spectral action and renormalization group analysis of the gauge couplings
• Lepton Flavor Violating $B\to K_2^{\ast }(1430){\mu }^{\pm }{\tau }^{\mp }$ Decays
• Visible energy and angular distributions of the charged particle from the $\tau -$decay in $b\to c\tau (\mu {\bar{\nu }}_{\mu }{\nu }_{\tau },\pi {\nu }_{\tau },\rho {\nu }_{\tau }){\bar{\nu }}_{\tau }$ reactions
• Evidence for $B^{-}\to D^{\ast \ast 0}{\tau }^{-}\overline{{\nu }_{\tau }}$ decays
• Assessing Lepton Flavor Universality Violations in Semileptonic Decays
• Angular analysis of $\bar{B}\to D_2^{\ast }(\to D\pi )\ell \bar{\nu }$ decay and new physics
• Electric Dipole Moments as Probes of $B$ Anomaly
• Measurements of the branching fractions of the inclusive decays $D^0(D^{+})\to {\pi }^{+}{\pi }^{+}{\pi }^{-}X$
• Generic tests of CP-violation in high-$p_{\text{T}}$ multi-lepton signals at the LHC and beyond
• Testing Lepton Flavour Universality in ${\rm Y}(4S)$ Decays
• Anomalies in B mesons decays: Present status and future collider prospects
• Amplitude analysis and branching fraction measurement of $D_s^{+}\to K^{-}{K}^{+}{\pi }^{+}{\pi }^{+}{\pi }^{-}$
• 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
• Exploring the role of new physics in $b\to u\tau \bar{\nu }$ decays
• Corrections to $R_D$ and $R_{D^{\ast }}$ in the BLMSSM
• Implications of new physics in $B\to K_1{\mu }^{+}{\mu }^{-}$ decay processes
• Explaining the $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ Anomalies in the $B-L$ Supersymmetric Standard Model with Inverse Seesaw
• A Search for Charged Lepton Flavor Violation in the Mu2e Experiment
• Status of G2HDM with right handed neutrino coupling in the light of $b\to c\tau \nu$ anomalies
• Decay $B_c^{+}\to D_{(s)}^{(\ast )+}{\ell }^{+}{\ell }^{-}$ within covariant confined quark model
• Flavour Anomalies: A comparative analysis using a machine learning algorithm
• Flavour anomalies meet flavour symmetry
• Recent progress in decays of $b$ and $c$ hadrons
• Neutron decay into a Dark Sector via Leptoquarks
• Probing new physics effects in ${\Lambda }_b\to \Lambda (\to p{\pi }^{-}){\ell }^{+}{\ell }^{-}$ decay via model independent approach
• Probing Light Scalars and Vector-like Quarks at the High-Luminosity LHC
• Searches for $B^0\to K^{+}{\pi }^{-}{\tau }^{+}{\tau }^{-}$ and $B_s^0\to K^{+}{K}^{-}{\tau }^{+}{\tau }^{-}$ decays
• Addressing the $R_{\tau /\mu ,e}\left(D^{(\ast )}\right)$ puzzle through New Physics four-fermion operators and their impact on ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ decay
• Closing the Gap on $R_{D^{\ast }}$ by including longitudinal effects
• Flavour Physics from Present to Future Colliders
• Probing new physics at the LHC with $\mathrm{b}\tau \nu$ final states
• The Angular Observables of ${\Lambda }_b\to {\Lambda }_c(\to {\Lambda }^0{\pi }^{+}){\tau }^{-}(\to {\pi }^{-}{\nu }_{\tau }){\bar{\nu }}_{\tau }$ within the Paradigm of FCCC Anomalies
• Joint LHCb--Belle II Prospects to Constrain New Physics in $B\to D^{(\ast )}\tau \nu$
• Tests of Lepton Flavour Universality with Semileptonic Decays at LHCb
• Predictions for ${\Lambda }_b\to {\Lambda }_c\tau \bar{\nu }$ in BLSSM with Inverse seesaw
• Lepton Flavour Universality tests in $b\to cl\nu$ decays at LHCb
• ${\eta }_c$ leading-twist distribution amplitude and the $B_c\to {\eta }_c\ell {\bar{\nu }}_{\ell }$ semileptonic decays using QCD Sum Rules
• A self-calibrating, double-ratio method to test tau lepton universality in W boson decays at the LHC
• Anomalies in the heavy sector
• Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Novel Model-Independent Approach to Explore New Physics in Five-body Semileptonic Decays
• Flavor Anomalies and Quark-Lepton Unification
• Lepton Flavour Universality tests and Lepton Flavour Violation searches at LHCb
• Rare B, D and K decays, radiative and electroweak penguin decays, including constraints on $V_{td}/V_{ts}$ and ${\epsilon }^{\prime }/\epsilon$: Summary of CKM 2018 working group 3