All Possible Lightest Supersymmetric Particles in R-Parity Violating mSUGRA Models and their Signals at the LHC

TL;DR

This paper explores how R-parity violation in minimal supergravity models can alter the identity of the lightest supersymmetric particle, affecting collider signatures and expanding the parameter space for potential LSP candidates.

Contribution

It identifies conditions for non-neutralino LSPs in R-parity violating mSUGRA models and discusses their implications for LHC signals.

Findings

Sneutrino, smuon, or squark can be the LSP.

Scalar tau LSP region is expanded.

Distinct LHC signatures for different LSPs.

Abstract

We consider minimal supergravity (mSUGRA) models with an additional R-parity violating operator at the grand unification scale. This can change the supersymmetric spectrum leading on the one hand to a sneutrino, smuon or squark as the lightest supersymmetric particle (LSP). On the other hand, a wide parameter region is reopened, where the scalar tau is the LSP. It is vital to know the nature of the LSP, because supersymmetric particles normally cascade decay down to the LSP at collider experiments. We investigate in detail the conditions leading to non-neutralino LSP scenarios. We also present some typical LHC signatures.