Hadronic tau decays as New Physics probes in the LHC era

Abstract

We analyze the sensitivity of hadronic tau decays to non-standard interactions within the model-independent framework of the Standard Model Effective Field Theory (SMEFT). Both exclusive and inclusive decays are studied, using the latest lattice data and QCD dispersion relations. We show that there are enough theoretically clean channels to disentangle all the effective couplings contributing to these decays, with the $\tau \to \pi \pi {\nu }_{\tau }$ channel representing an unexpected powerful New Physics probe. We find that the ratios of non-standard couplings to the Fermi constant are bound at the sub-percent level. These bounds are complementary to the ones from electroweak precision observables and $pp\to \tau {\nu }_{\tau }$ measurements at the LHC. The combination of tau decay and LHC data puts tighter constraints on lepton universality violation in the gauge boson-lepton vertex corrections.

arXiv comment8 pages; v2: comments and references added, PRL version

References in corpus (58)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• Dimension-Six Terms in the Standard Model Lagrangian
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• The muon $g-2$ and $\alpha (M_Z^2)$: a new data-based analysis
• 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
• 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
• Hadronic Z- and tau-Decays in Order alpha_s^4
• 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
• Branching ratios and spectral functions of tau decays: final ALEPH measurements and physics implications
• Domain wall QCD with physical quark masses
• Precision Tau Physics
• High Precision determination of the pi, K, D and D_s decay constants from lattice QCD
• Semileptonic decays of light quarks beyond the Standard Model
• High-$p_T$ dilepton tails and flavour physics
• A percent-level determination of the nucleon axial coupling from Quantum Chromodynamics
• New physics searches in nuclear and neutron $\beta$ decay
• Renormalization-group evolution of new physics contributions to (semi)leptonic meson decays
• Compilation of low-energy constraints on 4-fermion operators in the SMEFT
• Update of the ALEPH non-strange spectral functions from hadronic $\tau$ decays
• The Standard Model prediction for R_{e/mu}^{(pi,K)}
• Renormalization group analysis of the tau-lepton decay within QCD
• Isovector Charges of the Nucleon from 2+1+1-flavor Lattice QCD
• Right-handed charged currents in the era of the Large Hadron Collider
• V_us and m_s from hadronic tau decays
• Non-standard Charged Current Interactions: beta decays versus the LHC
• The strong coupling from the revised ALEPH data for hadronic $\tau$ decays
• Duality violations and spectral sum rules
• 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
• Short and Long Distance Effects in the Decay $\tau \to \pi {\nu }_{\tau }(\gamma )$
• Global Effective-Field-Theory analysis of New-Physics effects in (semi)leptonic kaon decays
• Lattice determination of the $K\to (\pi \pi {)}_{I=2}$ Decay Amplitude $A_2$
• K^L_{mu3} decay: A Stringent Test of Right-Handed Quark Currents
• The Low Energy Constants of $SU(2)$ Partially Quenched Chiral Perturbation Theory from $N_f=2+1$ Domain Wall QCD
• SU(2) chiral perturbation theory low-energy constants from 2+1 flavor staggered lattice simulations
• Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit
• Lattice QCD at the physical point meets SU(2) chiral perturbation theory
• 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
• NLO QCD corrections to SM-EFT dilepton and electroweak Higgs boson production, matched to parton shower in POWHEG
• Determination of <2pi_{I=2}|Q_{7,8}|K0> in the Chiral Limit
• A no-go theorem for non-standard explanations of the $\tau \to K_S\pi {\nu }_{\tau }$ CP asymmetry
• Predictions on the second-class current decays ${\tau }^{-}\to {\pi }^{-}{\eta }^{(\prime )}{\nu }_{\tau }$
• Search for High-Mass Resonances Decaying to $\tau \nu$ in $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• Pinched weights and Duality Violation in QCD Sum Rules: a critical analysis
• Effective-field theory analysis of the ${\tau }^{-}\to {\pi }^{-}{\pi }^0{\nu }_{\tau }$ decays
• Tests of non-standard electroweak couplings of right-handed quarks
• Updated determination of chiral couplings and vacuum condensates from hadronic tau decay data
• Novel patterns for vector mesons from the large-Nc limit
• Effective-field theory analysis of the ${\tau }^{-}\to {\eta }^{(\prime )}{\pi }^{-}{\nu }_{\tau }$ decays
• Low-energy constants and condensates from ALEPH hadronic $\tau$ decay data
• U(2)^5 flavor symmetry and lepton universality violation in W -> tau nu_tau

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• Radiative corrections to $\tau \to \pi (K){\nu }_{\tau }[\gamma ]$: a reliable new physics test
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• Constraints on the charged-current non-standard neutrino interactions induced by the gauge boson $W^{\prime }$
• Lepton-pair production in di-pion $\tau$ lepton decays
• Semileptonic $\tau$ decays: powerful probes of non-standard charged current weak interactions
• On the EFT validity for Drell-Yan tails at the LHC
• Hidden physics in pion and some other meson decays
• CP violation in two-meson Tau decays induced by heavy new physics
• Hadronic contributions to $a_{\mu }$ within Resonance Chiral Theory
• Excess of Tau events at SND@LHC, FASER$\nu$ and FASER$\nu$2
• Computing one-loop radiative corrections in $\tau \to \pi (K)\nu [\gamma ]$ and testing new physics
• Electromagnetic corrections in hadronic tau decays
• Isospin-breaking corrections to ${\tau }^{-}\to {\pi }^{-}{\pi }^0{\nu }_{\tau }$ decays and the muon $g-2$