Semileptonic tau decays beyond the Standard Model

Abstract

Hadronic $\tau$ decays are studied as probe of new physics. We determine the dependence of several inclusive and exclusive $\tau$ observables on the Wilson coefficients of the low-energy effective theory describing charged-current interactions between light quarks and leptons. The analysis includes both strange and non-strange decay channels. The main result is the likelihood function for the Wilson coefficients in the tau sector, based on the up-to-date experimental measurements and state-of-the-art theoretical techniques. The likelihood can be readily combined with inputs from other low-energy precision observables. We discuss a combination with nuclear beta, baryon, pion, and kaon decay data. In particular, we provide a comprehensive and model-independent description of the new physics hints in the combined dataset, which are known under the name of the Cabibbo anomaly.

arXiv comment58 pages; V2: Table 1 added, final published version

References in corpus (109)

• Weak Decays Beyond Leading Logarithms
• The muon $g-2$ and $\alpha (M_Z^2)$: a new data-based analysis
• Physics of leptoquarks in precision experiments and at particle colliders
• Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and alpha(mZ) using newest hadronic cross-section data
• The $g-2$ of charged leptons, $\alpha (M_Z^2)$ and the hyperfine splitting of muonium
• Hadronic contributions to $(g-2)$ of the leptons and to the effective fine structure constant $\alpha (M_Z^2)$
• Domain wall QCD with physical quark masses
• Precision Tau Physics
• High-Precision c and b Masses, and QCD Coupling from Current-Current Correlators in Lattice and Continuum QCD
• $B$- and $D$-meson leptonic decay constants from four-flavor lattice QCD
• Reduced hadronic uncertainty in the determination of $V_{ud}$
• The Physics of Hadronic Tau Decays
• Semileptonic decays of light quarks beyond the Standard Model
• rho^0-gamma mixing in the neutral channel pion form factor |F_pi|^2 and its role in comparing e^+ e^- with tau spectral functions
• A percent-level determination of the nucleon axial coupling from Quantum Chromodynamics
• Renormalization-group evolution of new physics contributions to (semi)leptonic meson decays
• Resonance estimates of O(p^6) low-energy constants and QCD short-distance constraints
• Effective Field Theory Description of the Pion Form Factor
• Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e+e- -> pi+pi- cross section data from BABAR
• Update of the ALEPH non-strange spectral functions from hadronic $\tau$ decays
• High-precision quark masses and QCD coupling from $n_f=4$ lattice QCD
• The Standard Model prediction for R_{e/mu}^{(pi,K)}
• alpha_s and the tau hadronic width: fixed-order, contour-improved and higher-order perturbation theory
• On the single leptoquark solutions to the $B$-physics anomalies
• The Determination of alpha_s from Tau Decays Revisited
• Isovector Charges of the Nucleon from 2+1+1-flavor Lattice QCD
• Non-standard Charged Current Interactions: beta decays versus the LHC
• Isospin Violation and the Magnetic Moment of the Muon
• Radiative tau decay and the magnetic moment of the muon
• Global Fit to Modified Neutrino Couplings and the Cabibbo-Angle Anomaly
• The strong coupling from the revised ALEPH data for hadronic $\tau$ decays
• Pseudoscalar decay constants of kaon and D-mesons from Nf=2 twisted mass Lattice QCD
• Duality violations and spectral sum rules
• Beta decays as sensitive probes of lepton flavor universality
• Form Factors in the radiative pion decay
• Determination of the QCD Coupling from ALEPH $\tau$ Decay Data
• Determination of m_s and |V_us| from hadronic tau decays
• Operator Product Expansion, Heavy Quarks, QCD Duality and its Violations
• Comprehensive analysis of beta decays within and beyond the Standard Model
• Lepton flavor violation in the Higgs sector and the role of hadronic tau-lepton decays
• Strange Quark Mass Determination from Cabibbo-Suppressed Tau Decays
• Hadronic tau decays as New Physics probes in the LHC era
• Global Effective-Field-Theory analysis of New-Physics effects in (semi)leptonic kaon decays
• Patterns of Spontaneous Chiral Symmetry Breaking in the Large-Nc Limit of QCD-Like Theories
• A note on isospin violation in Pl2(gamma) decays
• QCD Short-distance Constraints and Hadronic Approximations
• A "Known" CP Asymmetry in $\tau$ Decays
• Perturbative expansion of tau hadronic spectral function moments and alpha_s extractions
• K^L_{mu3} decay: A Stringent Test of Right-Handed Quark Currents
• The ratio FK/Fpi in QCD
• Precise determination of the strong coupling constant in Nf=2+1 lattice QCD with the Schrödinger functional scheme
• The Fermi constant from muon decay versus electroweak fits and CKM unitarity
• Chiral Perturbation Theory with tensor sources
• Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit
• SU(2) chiral perturbation theory low-energy constants from 2+1 flavor staggered lattice simulations
• The CKM parameters in the SMEFT
• Improved Determination of the Electroweak Penguin Contribution to epsilon'/epsilon in the Chiral Limit
• Matrix elements of the electromagnetic operator between kaon and pion states
• On the Statistical Treatment of the Cabibbo Angle Anomaly
• The Realistic Lattice Determination of alpha_s(M_Z) Revisited
• Determination of the QCD coupling from the static energy and the free energy
• Perturbative expansion of the QCD Adler function improved by renormalization-group summation and analytic continuation in the Borel plane
• New $\tau$-based evaluation of the hadronic contribution to the vacuum polarization piece of the muon anomalous magnetic moment
• Short-distance HLbL contributions to the muon anomalous magnetic moment beyond perturbation theory
• High statistic measurement of the K- -> pi0 e- nu decay form-factors
• Magnetic susceptibility of QCD matter and its decomposition from the lattice
• Hyperasymptotics and quark-hadron duality violations in QCD
• Scheme variations of the QCD coupling and hadronic $\tau$ decays
• Quark-Hadron Duality
• Determination of <2pi_{I=2}|Q_{7,8}|K0> in the Chiral Limit
• Reactor neutrino oscillations as constraints on Effective Field Theory
• Predictions on the second-class current decays ${\tau }^{-}\to {\pi }^{-}{\eta }^{(\prime )}{\nu }_{\tau }$
• Expansion functions in perturbative QCD and the determination of ${\alpha }_s(M_{\tau }^2)$
• Higher-order QCD corrections to hadronic $\tau$ decays from Padé approximants
• Dispersion relation analysis of the radiative corrections to $g_A$ in the neutron $\beta$-decay
• The strong coupling from an improved $\tau$ vector isovector spectral function
• Pinched weights and Duality Violation in QCD Sum Rules: a critical analysis
• Tests of non-standard electroweak couplings of right-handed quarks
• Effective-field theory analysis of the ${\tau }^{-}\to {\pi }^{-}{\pi }^0{\nu }_{\tau }$ decays
• $F_K/F_{\pi }$ from Möbius domain-wall fermions solved on gradient-flowed HISQ ensembles
• Updated determination of chiral couplings and vacuum condensates from hadronic tau decay data
• Determination of ${\alpha }_s(M_{\tau }^2)$ from Improved Fixed Order Perturbation Theory
• Predicting the tau strange branching ratios and implications for V_{us}
• Nucleon matrix elements of the antisymmetric quark tensor
• Novel patterns for vector mesons from the large-Nc limit
• A resolution of the inclusive flavor-breaking $\tau$ $|V_{us}|$ puzzle
• Exclusive hadronic tau decays as probes of non-SM interactions
• Modified Contour-Improved Perturbation Theory
• Complete theory of radiative corrections to $K_{\ell 3}$ decays and the $V_{us}$ update
• Measurement of the neutron decay electron-antineutrino angular correlation by the aCORN experiment
• Effective-field theory analysis of the ${\tau }^{-}\to {\eta }^{(\prime )}{\pi }^{-}{\nu }_{\tau }$ decays
• On the Difference between FOPT and CIPT for Hadronic Tau Decays
• Precision physics with inclusive QCD processes
• Low-energy constants and condensates from ALEPH hadronic $\tau$ decay data
• Conformal mapping of the Borel plane: going beyond perturbative QCD
• Running coupling constant from position-space current-current correlation functions in three-flavor lattice QCD
• Flavour breaking effects in the pseudoscalar meson decay constants
• Determination of perturbative QCD coupling from ALEPH $\tau$ decay data using pinched Borel-Laplace and Finite Energy Sum Rules
• Leptonic decay-constant ratio $f_K/f_{\pi }$ from lattice QCD using 2+1 clover-improved fermion flavors with 2-HEX smearing
• A Combined NNLO Lattice-Continuum Determination of $L_{10}^r$
• Renormalons in integrated spectral function moments and ${\alpha }_s$ extractions
• Topological susceptibility of QCD with dynamical Möbius domain wall fermions
• SU(3) analysis of four-quark operators: $K\to \pi \pi$ and vacuum matrix elements
• OPE-RchiT matching at order alpha_s: hard gluonic corrections to three-point Green functions
• Extraction of m_s and |V_us| from Hadronic Tau Decays
• Understanding perturbative results for decays of τleptons into hadrons
• Model Independent Electromagnetic corrections in hadronic $\tau$ decays
• $K_{e3}$ decay studies in OKA experiment
• Semileptonic $\tau$ decays: powerful probes of non-standard charged current weak interactions

Cited by in corpus (8)

• Particle Physics at the European Spallation Source
• EFT analysis of New Physics at COHERENT
• Ab initio calculation of the $\beta$ decay spectrum of ${}^6$He
• Violations of Quark-Hadron Duality in Low-Energy Determinations of ${\alpha }_s$
• Constraints on subleading interactions in beta decay Lagrangian
• On the sensitivity of the D parameter to new physics
• Precision pulse shape simulation for proton detection at the Nab experiment
• Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap