Lepton Flavor Violation without Supersymmetry

Abstract

We study the lepton flavor violating (LFV) processes mu -> e gamma, mu -> 3e, and mu -> e conversion in nuclei in the left-right symmetric model without supersymmetry and perform the first complete computation of the LFV branching ratios B(mu -> f) to leading non-trivial order in the ratio of left- and right-handed symmetry breaking scales. To this order, B(mu -> e gamma) and B(mu -> e) are governed by the same combination of LFV violating couplings, and their ratio is naturally of order unity. We also find B(mu -> 3 e)/B(mu -> e) \sim 100 under slightly stronger assumptions. Existing limits on the branching ratios already substantially constrain mass splittings and/or mixings in the heavy neutrino sector. When combined with future collider studies and precision electroweak measurements, improved limits on LFV processes will test the viability of low-scale, non-supersymmetric LFV scenarios.

24 pages, 7 figures, 2 tables

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Cited by in corpus (69)

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• Physics at a future Neutrino Factory and super-beam facility
• Unified Models of Neutrinos, Flavour and CP Violation
• Neutrinoless Double Beta Decay and Heavy Sterile Neutrinos
• Heavy Neutrinos and Lepton Flavour Violation in Left-Right Symmetric Models at the LHC
• Lepton number and flavour violation in TeV-scale left-right symmetric theories with large left-right mixing
• On the model discriminating power of mu -> e conversion in nuclei
• Natural TeV-Scale Left-Right Seesaw for Neutrinos and Experimental Tests
• Low Energy Precision Test of Supersymmetry
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• Probing the Higgs Sector of the Minimal Left-Right Symmetric Model at Future Hadron Colliders
• Lepton Number Violation in Higgs Decay at LHC
• TeV Scale Left-Right Symmetry and Large Mixing Effects in Neutrinoless Double Beta Decay
• Displaced vertex signatures of doubly charged scalars in the type-II seesaw and its left-right extensions
• Probing Leptogenesis
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• Majorana Higgses at colliders
• The model-discriminating power of lepton flavor violating tau decays
• Gravitational Waves from a Pati-Salam Phase Transition
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• The Scalar Triplet Contribution to Lepton Flavour Violation and Neutrinoless Double Beta Decay in Left-Right Symmetric Model
• Flavour in heavy neutrino searches at the LHC
• Low- and high-energy phenomenology of a doubly charged scalar
• Left-right models with light neutrino mass prediction and dominant neutrinoless double beta decay rate
• A low-energy perspective on the minimal left-right symmetric model
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• Probing Minimal Flavor Violation at the LHC
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• Seesaw at LHC through Left - Right Symmetry
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• Surveying the SO(10) Model Landscape: The Left-Right Symmetric Case
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• CP Violating Effects in Heavy Neutrino Oscillations: Implications for Colliders and Leptogenesis
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• Doubly-charged scalars of the Minimal Left-Right Symmetric Model at Muon Colliders
• Lepton Number Violation, Lepton Flavour Violation and Baryogenesis in Left-Right Symmetric Model
• Neutrino 2020: Theory Outlook
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• Phenomenology of two texture zero neutrino mass in left-right symmetric model with $Z_8\times Z_2$
• Neutrinoless double beta decay in minimal left-right symmetric model with universal seesaw
• Neutrino phenomenology in a left-right $D_4$ symmetric model
• Phenomenological Study of Texture Zeros in Lepton Mass Matrices of Minimal Left-Right Symmetric Model
• Muon Physics: A Pillar of the Standard Model
• Time-reversal symmetry violation in several Lepton-Flavor-Violating processes
• Low Energy Constraints From Absolute Neutrino Mass Observables and Lepton Flavor Violation in Left-Right Symmetric Model
• Learning about flavour structure from tau to ell gamma and mu to e gamma?
• Effect of large light-heavy neutrino mixing and natural type-II seesaw dominance to lepton flavor violation and neutrinoless double beta decay
• New Mixing Angles in the Left-Right Symmetric Model
• Leptonic probes of Alternative Left-Right Symmetric Models
• Neutrino Mass and Neutrinoless double beta decay in SO(10) GUT with Pati-Salam symmetry
• Exploring dynamics of $A_4$ flavour symmetry using low scale seesaw mechanisms
• $A_4$ realization of left-right symmetric linear seesaw
• Loop-Level Lepton Flavor Violation and Diphoton Signals in the Minimal Left-Right Symmetric Model