Lepton-flavour violation in hadronic tau decays and $\mu -\tau$ conversion in nuclei

Abstract

Within the Standard Model Effective Field Theory framework, with operators up to dimension 6, we perform a model-independent analysis of the lepton-flavour-violating processes involving tau leptons. Namely, we study hadronic tau decays and $\ell$--$\tau$ conversion in nuclei, with $\ell =e,\mu$. Based on available experimental limits, we establish constraints on the Wilson coefficients of the operators contributing to these processes. Our work paves the way to extract the related information from Belle II and foreseen future experiments.

49 pages, 12 figures

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• Searches for Lepton Flavor Violation in Tau Decays at Belle II
• $CP$ asymmetry in the angular distributions of $\tau \to K_S\pi {\nu }_{\tau }$ decays -- II: general effective field theory analysis
• Gearing up for the next generation of LFV experiments, via on-shell methods
• Light scalars within the $\mathcal{C}\mathcal{P}$-conserving Aligned-two-Higgs-doublet model
• Constraints on leptoquarks from lepton-flavour-violating tau-lepton processes
• Lepton Flavor Violation from diphoton effective interactions
• Lepton flavor violation in the Littlest Higgs Model with T parity realizing an inverse seesaw
• Lepton flavor violation within the Simplest Little Higgs model
• Lepton Flavour Violation in Hadron Decays of the Tau Lepton within the Littlest Higgs Model with T-parity
• Nonperturbative effects in neutrino magnetic moments
• Quasi-Dirac neutrinos in the linear seesaw model
• Search for lepton-flavor-violating ${\tau }^{-}\to {\ell }^{-}{K}_s^0$ decays at Belle and Belle II
• Constraints on lepton-flavor mixing with third-generation new physics
• Charged lepton flavor violation associated with heavy quark production in deep inelastic lepton-nucleon scattering via scalar exchange
• Revisiting lepton flavor violation: $\tau$ and meson decays