Charged LFV in a low-scale seesaw mSUGRA model

TL;DR

This paper studies how mSUGRA boundary conditions affect lepton flavor violation in a supersymmetric model with TeV-scale heavy neutrinos, showing potential increases in certain decay branching ratios.

Contribution

It demonstrates that mSUGRA boundary conditions can significantly enhance LFV decay rates in a TeV-scale seesaw MSSM extension.

Findings

Branching ratios for muon and tau decays into three leptons can increase up to five times.

Photonic decay branching ratios remain nearly unchanged under mSUGRA boundary conditions.

The influence of boundary conditions is crucial for predicting LFV signals in supersymmetric models.

Abstract

We investigate the influence of the boundary conditions of minimal supergravity (mSUGRA) on the supersymmetric mechanism for lepton flavour violation (LFV) proposed recently [1], within the framework of the MSSM extended by TeV-scale singlet heavy neutrinos. We find that the consideration of the mSUGRA boundary condition may increase the branching ratios of the muon and tauon decaying into three charged leptons by up to a factor of 5, whereas the corresponding branching ratio for their photonic decays remains almost unchanged.