Same-sign trileptons as a signal of sneutrino lightest supersymmetric partlcle

TL;DR

This paper proposes that same-sign trilepton events at the LHC can serve as a distinctive signature for scenarios where a left-sneutrino is the lightest supersymmetric particle, impacting collider and dark matter research.

Contribution

It introduces a novel collider signature for sneutrino LSP scenarios, demonstrating the potential to detect such cases up to gluino masses over 2 TeV.

Findings

Same-sign trilepton events can identify sneutrino LSP scenarios.

Leptonic signals are enhanced due to suppressed jets + MET signals.

Detection is feasible for gluino masses exceeding 2 TeV.

Abstract

Contrary to common expectation, a left-sneutrinos can occasionally be the lightest supersymmet- ric particle. This has important implications in both collider and dark matter studies. We show that same-sign tri-lepton (SS3L) events at the Large Hadron Collider, with any lepton having opposite sign vetoed, distinguish such scenarios, up to gluino masses exceeding 2 TeV. The jets + M ET signal rate is somewhat suppressed in this case, thus enhancing the scope of leptonic signals.