Impact of slepton generation mixing on the search for sneutrinos - Lepton flavour violation in sneutrino production and decays in the general MSSM

TL;DR

This paper investigates how slepton generation mixing influences sneutrino production and decay processes in the MSSM, revealing significant effects that could impact future collider searches despite strict experimental limits on lepton flavor violation.

Contribution

It provides a systematic analysis of slepton mixing effects on sneutrino phenomenology in the MSSM, highlighting potential impacts on collider search strategies.

Findings

Slepton mixing can significantly alter sneutrino decay modes.

Effects are substantial in large regions of MSSM parameter space.

Implications for future collider experiments are discussed.

Abstract

We perform a systematic study of sneutrino production and decays in the Minimal Supersymmetric Standard Model (MSSM) with slepton generation mixing. We study bosonic decays like sneutrino \to slepton^- + W^+/H^+ as well as fermionic ones. We show that the effect of slepton generation mixing on the sneutrino production and decays can be quite large in a significant part of the MSSM parameter space despite the very strong experimental limits on lepton flavour violating processes. This could have an important impact on the search for sneutrinos and the determination of the MSSM parameters at future colliders, such as LHC, ILC, CLIC and muon collider.