Impact of slepton generation mixing on the search for sneutrinos

TL;DR

This paper investigates how slepton generation mixing influences sneutrino production and decay in the MSSM, revealing significant effects that could impact collider searches and parameter determination despite strict LFV constraints.

Contribution

It provides a systematic analysis of LFV effects on sneutrino phenomenology, highlighting potential large impacts on collider-based searches and MSSM parameter extraction.

Findings

Slepton mixing can significantly affect sneutrino decay modes.

LFV effects remain sizable despite experimental constraints.

Implications for collider searches like LHC, ILC, CLIC, and muon colliders.

Abstract

We perform a systematic study of sneutrino production and decays in the Minimal Supersymmetric Standard Model (MSSM) with lepton flavour violation (LFV). We study bosonic decays of sneutrinos 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 LFV processes. This could have an important impact on the search for sneutrinos and the determination of the MSSM parameters at LHC and future colliders, such as ILC, CLIC and muon collider.