Decoupling of heavy sneutrinos in low-scale seesaw models

Abstract

There have been some recent claims in the literature about large right-handed sneutrinos contributions to lepton flavor violating observables like $\mu \to 3e$ or $\mu -e$ conversion in nuclei in supersymmetric low-scale seesaw models. These large contributions originate from $Z$-penguin diagrams which show a much weaker dependence on the heavy masses than the photonic contributions. We have traced this to an error in the evaluation of the corresponding loop amplitudes which has propagated in the literature. We explicitly show that after correcting this mistake the $Z$-penguins show the expected decoupling behavior. Moreover, the reported dominance of the $Z$-penguin over the photonic contributions disappears as well.

7 pages, 2 figures; v2: minor changes, appendix added; matches published version in PRD

References in corpus (15)

• Global status of neutrino oscillation parameters after Neutrino-2012
• Global fit to three neutrino mixing: critical look at present precision
• Status of three-neutrino oscillation parameters, circa 2013
• Automatic Calculation of supersymmetric Renormalization Group Equations and Self Energies
• SARAH 3.2: Dirac Gauginos, UFO output, and more
• $\mu -e$ conversion in nuclei within the CMSSM seesaw: universality versus non-universality
• Lepton flavour violating semileptonic tau decays in constrained MSSM-seesaw scenarios
• Impact of ${\theta }_{13}$ on Lepton Flavour Violating processes within SUSY Seesaw
• Precise limits from lepton flavour violating processes on the Littlest Higgs model with T-parity
• Probing minimal supergravity in the type-I seesaw mechanism with lepton flavour violation at the CERN LHC
• Supersymmetric seesaw type II: CERN LHC and lepton flavour violating phenomenology
• Phenomenology of the minimal supersymmetric $U(1{)}_{B-L}\times U(1{)}_R$ extension of the standard model
• New bounds on trilinear R-parity violation from lepton flavor violating observables
• Interplay of LFV and slepton mass splittings at the LHC as a probe of the SUSY seesaw
• Supersymmetric type-III seesaw: lepton flavour violation and LHC phenomenology

Cited by in corpus (5)

• Exploring new models in all detail with SARAH
• A Flavor Kit for BSM models
• Towards a unified explanation of $R_{D^{(\ast )}}$, $R_K$ and $(g-2{)}_{\mu }$ anomalies in a left-right model with leptoquarks
• Scrutinizing $R$-parity violating interactions in light of $R_{K^{(\ast )}}$ data
• Magnetic Moments of Leptons, Charged Lepton Flavor Violations and Dark Matter Phenomenology of a Minimal Radiative Dirac Neutrino Mass Model