Exploring novel correlations in trilepton channels at the LHC for the minimal supersymmetric inverse seesaw model

TL;DR

This paper explores how the minimal supersymmetric inverse seesaw model can produce distinctive three-lepton signatures at the LHC, linked to neutrino mixing angles, and assesses their observability against standard model backgrounds.

Contribution

It introduces a novel correlation between chargino decay patterns and neutrino mixing angles in the inverse seesaw model, and evaluates the potential for LHC detection of these signals.

Findings

Distinctive three-lepton signatures can be observed at the LHC.

The decay patterns correlate with atmospheric neutrino mixing angles.

Signals remain detectable even after standard model background considerations.

Abstract

We investigate signatures of the minimal supersymmetric inverse seesaw model at the large hadron collider (LHC) with three isolated leptons and large missing energy (3\ell + \mET or 2\ell + 1\tau + \mET, with \ell=e,\mu) in the final state. This signal has its origin in the decay of chargino-neutralino (\chpm1\ntrl2) pair, produced in pp collisions. The two body decays of the lighter chargino into a charged lepton and a singlet sneutrino has a characteristic decay pattern which is correlated with the observed large atmospheric neutrino mixing angle. This correlation is potentially observable at the LHC by looking at the ratios of cross sections of the trilepton + \mET channels in certain flavour specific modes. We show that even after considering possible leading standard model backgrounds these final states can lead to reasonable discovery significance at the LHC with both 7 TeV and 14 TeV center-of-mass energy.