Supersymmetric Z' decays at the LHC

TL;DR

This paper explores supersymmetric Z' boson decays at the 14 TeV LHC, focusing on new decay channels into supersymmetric particles and their implications for dark matter searches.

Contribution

It extends the MSSM to include heavy gauge bosons and analyzes Z' decays into supersymmetric particles, providing new insights beyond standard dilepton search strategies.

Findings

Z' decays into sleptons, charginos, and neutralinos produce distinctive leptonic and missing energy signatures.

Parameter space points are consistent with a 125 GeV Higgs boson.

Potential to search for dark matter candidates via Z' decays into neutralinos.

Abstract

Searching for Z' bosons, predicted in GUT-inspired U(1)' gauge models and in the Sequential Standard Model, is one of the main challenges of the experiments carried out at the Large Hadron Collider. Such searches have so far focused on high-mass dilepton pairs, assuming that the Z' has only Standard Model decay modes, and have set mass exclusion limits around 2.5-3 TeV. In this talk, I investigate supersymmetric Z' decays at 14 TeV LHC, extending the MSSM in such a way to accommodate extra heavy gauge bosons. In particular, I study Z' decays into pairs of sleptons, charginos and neutralinos, leading to final states with leptons and missing energy, and present results for few reference points of the parameter space, consistent with a SM-like Higgs boson with a mass around 125 GeV. I also discuss the feasibility to search for Dark Matter candidates, by analysing Z' decays into the lightest MSSM neutralinos.