Sneutrino LSPs in R-parity violating minimal supergravity models

TL;DR

This paper explores how adding R-parity violating interactions in minimal supergravity models can result in sneutrinos being the lightest supersymmetric particles, with implications for collider experiments and precision measurements.

Contribution

It demonstrates that lepton number violating couplings at the GUT scale can produce sneutrino LSPs in mSUGRA models, expanding the understanding of possible supersymmetric spectra.

Findings

Sneutrino LSPs are viable in R-parity violating mSUGRA models.

Collider signatures at the LHC are characterized for sneutrino LSP scenarios.

Parameter space is consistent with muon g-2 and precision measurements.

Abstract

We consider the minimal supergravity model (mSUGRA) with one additional R-parity violating operator at the GUT scale. The superparticles mass spectra at the weak scale are generally altered due to the presence of the R-parity violating coupling in the renormalization group equations. We show that a lepton number violating coupling at the GUT scale can lead to a sneutrino as the lightest supersymmetric particle (LSP) in a large region of parameter space consistent with the muon anomalous magnetic moment and other precision measurements. We also give characteristic collider signatures at the LHC.