Same sign diboson signature from supersymmetry models with light higgsinos at the LHC

TL;DR

This paper proposes a new LHC search strategy for supersymmetry involving same-sign diboson signatures from light higgsinos and winos, which could outperform traditional gluino searches.

Contribution

It introduces a novel search channel based on same-sign diboson plus missing energy, enhancing SUSY detection prospects with light higgsinos at the LHC.

Findings

The proposed SS diboson channel has a higher reach than gluino pair searches.

Assuming gaugino mass unification, the method is effective with >100 fb^{-1} luminosity.

The search is feasible with modest jet activity and specific final states.

Abstract

In supersymmetric models with light higgsinos (which are motivated by electroweak naturalness arguments), the direct production of higgsino pairs may be difficult to search for at LHC due to the low visible energy release from their decays. However, the wino pair production reaction \tw_2^\pm\tz_4\to (W^\pm\tz_{1,2})+(W^\pm\tw_1^\mp) also occurs at substantial rates and leads to final states including equally opposite-sign (OS) and same-sign (SS) diboson production. We propose a novel search channel for LHC14 based on the SS diboson plus missing E_T final state which contains only modest jet activity. Assuming gaugino mass unification, and an integrated luminosity > 100 fb^{-1}, this search channel provides a reach for SUSY well beyond that from usual gluino pair production.