Systematic Approach to Gauge-Invariant Relations between Lepton Flavor Violating Processes

Abstract

We analyze four-lepton contact interactions that lead to lepton flavor violating processes, with violation of individual family lepton number but total lepton number conserved. In an effective Lagrangian framework, the assumption of gauge invariance leads to relations among branching ratios and cross sections of lepton flavor violating processes. In this paper, we work out how to use these relations systematically. We also study the consequences of loop-induced processes.

17 pages, 1 figure, 5 tables

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• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Present and Future Bounds on Non-Standard Neutrino Interactions
• Improved limits on nuebar emission from mu+ decay

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• Constraints on two-lepton, two quark operators
• Nonstandard neutrino interactions at COHERENT, DUNE, T2HK and LHC
• Lepton flavour violating processes at the International Linear Collider
• New physics searches at near detectors of neutrino oscillation experiments
• Energy-Dependent Neutrino Mixing Parameters at Oscillation Experiments
• Z lepton flavour violation as a probe for new physics at future $e^{+}{e}^{-}$ colliders
• Neutrino Scattering on Glass: NuSOnG
• Constraining lepton flavor violating SMEFT $2q2\ell$ operators from low-energy cLFV processes
• Relation between Lepton Flavor Violating Processes