Lepton Flavor Violations in High-Scale SUSY with Right-Handed Neutrinos

TL;DR

This paper investigates lepton-flavor violations in high-scale supersymmetry models with right-handed neutrinos, showing that RG effects can lead to observable LFV signals and influence electroweak symmetry breaking.

Contribution

It demonstrates that in high-scale SUSY with right-handed neutrinos, RG effects can induce detectable LFV and expand the parameter space for successful electroweak symmetry breaking.

Findings

RG effects induce sizable LFV signals within experimental reach

Right-handed neutrinos enlarge the viable parameter space for EWSB

LFV predictions are consistent with current experimental constraints

Abstract

Motivated by the recent discovery of the Higgs boson at m_h = 126 GeV and also by the non-observation of superparticles at the LHC, high-scale SUSY, where the superparticles are as heavy as O(10) TeV, has been recently proposed. We study lepton-flavor violations (LFVs) in the high-scale SUSY with right-handed neutrinos. Even if the slepton masses are of O(10) TeV, the renormalization group (RG) effects on the slepton mass-squared matrix may induce large enough LFVs which are within the reach of future LFV experiments. We also discuss the implication of the right-handed neutrinos on the electroweak symmetry breaking in such a model, and show that the parameter region with the successful electroweak symmetry breaking is enlarged by the RG effects due to the right-handed neutrinos.