Muonium-antimuonium conversion in models with heavy neutrinos

Abstract

We study muonium-antimuonium conversion and mu+ e- to mu- e+ scattering within two different lepton-flavor-violating models with heavy neutrinos: model I is a typical seesaw that violates lepton number as well as flavor; model II has a neutrino mass texture where lepton number is conserved. We look for the largest possible amplitudes of these processes that are consistent with current bounds. We find that model I has very limited chance of providing an observable signal, except if a finely tuned condition in parameter space occurs. Model II, on the other hand, requires no fine tuning and could cause larger effects. However, the maximum amplitude provided by this model is still two orders of magnitude below the sensitivity of current experiments: one predicts an effective coupling G_MM up to 10^{-4}G_F for heavy neutrino masses near 10 TeV. We have also clarified some discrepancies in previous literature on this subject.

arXiv comment16 pages, 4 figures, reference added

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Cited by in corpus (21)

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• Charged Lepton Flavor Violation: An Experimenter's Guide
• Anatomy of F_D-Term Hybrid Inflation
• The Little Review on Leptogenesis
• Impact of sterile neutrinos on nuclear-assisted cLFV processes
• Electroweak Resonant Leptogenesis in the Singlet Majoron Model
• Muonium-antimuonium oscillations in effective field theory
• $W$ boson mass shift and muon magnetic moment in the Zee model
• Models of the Muonium to Antimuonium Transition
• Heavy neutral leptons and high-intensity observables
• Probing the doubly-charged Higgs with Muonium to Antimuonium Conversion Experiment
• Constraints on $Z^{\prime }$ Boson within Minimal Flavor Violation
• Neutrino masses and magnetic moments of electron and muon in the Zee Model
• Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations
• Low scale Seesaw model and Lepton Flavor Violating Rare B Decays
• Conceptual Design of the Muonium-to-Antimuonium Conversion Experiment (MACE)
• Lepton flavor violation in muonium decay and muon colliders in models with heavy neutrinos
• Gauge Invariance of the Muonium-Antimuonium Oscillation Time Scale and Limits on Right-Handed Neutrino Masses
• Muonium-Antimuonium Oscillations in an extended Minimal Supersymmetric Standard Model with right-handed neutrinos
• Seesaw Models under the Lens of Angular Distributions at ${\mu }^{+}{\mu }^{-},{\mu }^{+}{\mu }^{+},{\mu }^{+}\gamma$ and ${\mu }^{+}{e}^{-}$ Colliders
• Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED