Non-decoupling and lepton number violation in left-right models

Abstract

We argue that large non-decoupling effects of heavy neutrinos can appear naturally in manifestly left-right symmetric models due to the minimization conditions of the scalar potential and the structure of vev's imposed by phenomenology. We derive constraints on off-diagonal light-heavy and heavy-heavy neutrino mixings from the searches for lepton violating decays $\mu \to e\gamma ,$ $\mu \to e{e}^{-}{e}^{+}$ and $\mu -e$ conversion in nuclei. The most stringent limits come from the latter process because its amplitude shows a quadratic non-decoupling dependence on the heavy neutrino mass. Due to the suppression of right-handed currents by large $W_R$ mass the present experiments are not sensitive to the intergenerational mixings between heavy neutrinos if $M_{W_R}>200$ TeV.

revised version, results unchanged, submitted to NPB

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Cited by in corpus (18)

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• Heavy Neutrinos and Lepton Flavour Violation in Left-Right Symmetric Models at the LHC
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• Lepton Flavor Violation without Supersymmetry
• μ-e conversion in nuclei versus μ-->e γ: an effective field theory point of view
• Cumulative Non-Decoupling Effects of Kaluza-Klein Neutrinos in Electroweak Processes
• The model-discriminating power of lepton flavor violating tau decays
• Gauge and Scheme Dependence of Mixing Matrix Renormalization
• Lepton Flavour Violating Leptonic/Semileptonic Decays of Charged Leptons in the Minimal Supersymmetric Standard Model
• Mass bounds for Triplet Scalars of the Left-Right symmetric model and their future detection prospects
• Heavy neutrino mixing and single production at Linear Collider
• Spontaneous R-Parity violation bounds
• Neutrinos in a left-right model with a horizontal symmetry
• On-shell renormalization of the mixing matrices in Majorana neutrino theories
• Doubly charged Higgsino contribution to the decays mu-->e photon and mu-->3e and to the anomalous magnetic moment of the muon within the left-right supersymmetric model
• Testing Left-Right Symmetric Gauge Theories at e^+e^- Colliders
• Learning about flavour structure from tau to ell gamma and mu to e gamma?