Sneutrino as Lightest Supersymmetric Particle in B3 mSUGRA Models and Signals at the LHC

TL;DR

This paper explores B3 mSUGRA models with lepton number violation, showing that sneutrinos can be the lightest supersymmetric particles and analyzing their potential signals at the LHC.

Contribution

It demonstrates that lepton number violating operators in B3 mSUGRA models can lead to sneutrino LSPs and discusses their phenomenological implications for collider experiments.

Findings

Sneutrino can be the LSP in large parameter regions.

Constraints from neutrino masses and precision measurements are considered.

Characteristic LHC signatures of sneutrino LSP scenarios are identified.

Abstract

We consider B3 mSUGRA models where we have one lepton number violating LQD operator at the GUT scale. This can alter the supersymmetric mass spectrum leading to a sneutrino as the lightest supersymmetric particle in a large region of parameter space. We take into account the restrictions from neutrino masses, the muon anomalous magnetic moment, b -> s gamma and other precision measurements. We furthermore investigate existing restrictions from direct searches at LEP, the Tevatron and the CERN p\bar p collider. We then give examples for characteristic signatures at the LHC.