New Signals for Doubly-Charged Scalars and Fermions at the Large Hadron Collider

TL;DR

This paper proposes a new collider signature involving light doubly-charged Higgsinos and Higgs bosons in the minimal left-right supersymmetric model, enhancing detection prospects at the LHC.

Contribution

It introduces a novel signal channel for detecting light doubly-charged Higgsinos and Higgs bosons, expanding search strategies in supersymmetric models at the LHC.

Findings

Enhanced discovery potential for doubly-charged particles at the LHC.

Distinctive four-lepton plus missing energy signature identified.

Analysis shows increased reach for these particles in the proposed channel.

Abstract

Several extensions of the Standard Model have light doubly-charged Higgs bosons in their particle spectrum. The supersymmetric versions of these models introduce fermionic superpartners of these doubly-charged Higgs bosons, the Higgsinos, which also remain light. In this work we analyze a new collider signal resulting from the pair production and decay of a light doubly-charged Higgsino to an even lighter doubly-charged Higgs boson. We focus on the minimal left-right supersymmetric model with automatic R-parity conservation, which predicts such a light doubly-charged Higgs boson and its Higgsino partner at the TeV scale, which are singlets of SU(2)_L. We investigate the distinctive signatures of these particles with four leptons and missing transverse energy in the final state at the Large Hadron Collider and show that the discovery reach for both particles can be increased in this channel.