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Charged Lepton Flavor Violation

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arxiv 2209.00142 v1 pith:N4LI6SAZ submitted 2022-08-31 hep-ex hep-ph

classification hep-exhep-ph
keywords flavorchargedleptonphysicsviolationactivitiesalreadybeyond
verification ladder T0 review T1 audit T2 compute T3 formal
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This reports summarizes the activities of the Charged Lepton Flavor Violation group of the 2022 Community Summer Study. Charged lepton flavor violating reactions provide unique information on the scale and dynamics of flavor generation, and more generally a wide range of New Physics scenarios, complementing direct searches performed at collider and neutrino physics experiments. These processes already probe mass scales up to thousands of TeV, and an observation would be an unambiguous signature of physics beyond the Standard Model. We review the current status and future experimental opportunities in muon, tau and heavy state transitions, with a focus on US-led initiatives.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. ALP production in Lepton Flavour Violating meson, tau and gauge boson decays

    hep-ph 2026-04 unverdicted novelty 6.0 of 10

    ALPs with LFV couplings above the muon mass threshold can be produced in LFV meson, tau, and gauge boson decays, yielding clean eμ signatures that enable new searches at future experiments.

  2. Matter Unification and Lepton Flavour Violation

    hep-ph 2026-03 conditional novelty 6.0 of 10

    Muon-to-electron conversion at Mu2e can probe quark–lepton unification scales up to ~10^4 TeV in the minimal SU(4)_C×SU(2)_L×U(1)_R model, even where rare kaon decays are suppressed by unknown mixing angles.

  3. Discovery prospects of a singly-charged scalar at $\mu$TRISTAN

    hep-ph 2026-01 conditional novelty 6.0 of 10

    A same-sign muon collider could discover the singly-charged scalar of Type-II seesaw through a lepton-flavor-violating process, and the final lepton flavor could distinguish normal from inverted neutrino mass ordering...

  4. Loop-Level Lepton Flavor Violation and Diphoton Signals in the Minimal Left-Right Symmetric Model

    hep-ph 2025-12 conditional novelty 6.0 of 10

    Recasting axion limits onto the one-loop H3 couplings of the minimal left-right symmetric model excludes the right-handed scale up to 2×10^9 GeV and could eventually probe 6×10^11 GeV.

  5. Lepton flavor violating decay of true muonium: $\boldsymbol{(\mu^+ \mu^-) \to \mu^\pm e^\mp}$

    hep-ph 2025-07 conditional novelty 6.0 of 10

    True muonium could decay into a muon and an electron with branching ratio up to 10^-20, giving a new probe of charged lepton flavor violation.

  6. Probing flavor-diagonal couplings of doubly-charged scalar at low and high energies

    hep-ph 2025-12 conditional novelty 5.0 of 10

    Flavor-diagonal couplings of a TeV-scale right-handed doubly-charged scalar in the LRSM could be probed down to ~10^-2 by combining low-energy precision measurements with future lepton colliders.

  7. Polarization Probes of New Physics in Lepton-Flavor-Violating Hyperon Production from $e^- N \to \tau^- Y$ Scattering

    hep-ph 2025-06 conditional novelty 4.0 of 10

    Polarization asymmetries in e-N to tau-Y scattering could distinguish hyperon form factor models and the chiral nature of new lepton-flavor-violating vector interactions, but predicted rates are at most a few hundred ...

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