Testing the Mechanism for the LSP Stability at the LHC

TL;DR

This paper proposes methods to test the stability mechanism of the lightest supersymmetric particle at the LHC, focusing on distinctive Higgs decay signatures that could confirm R-parity conservation and SUSY models.

Contribution

It introduces experimental signatures, such as leptonic Higgs decays into right-handed neutrinos or sfermions, to verify the LSP stability mechanism at the LHC.

Findings

Potential for lepton number violating signals with four secondary vertices

Higgs decays into right-handed neutrinos or sfermions as test signatures

Complementary to standard SUSY discovery channels

Abstract

The lightest supersymmetric particle (LSP) is a natural candidate for the cold dark matter of the universe. In this Letter we discuss how to test the mechanism responsible for the LSP stability at the LHC. We note that if R-parity is conserved dynamically one should expect a Higgs boson which decays mainly into two right-handed neutrinos (a "leptonic" Higgs) or into two sfermions. The first case could exhibit spectacular lepton number violating signals with four secondary vertices due to the long-lived nature of right-handed neutrinos. These signals, together with the standard channels for the discovery of SUSY, could help to establish the underlying theory at the TeV scale.