Neutralino and Chargino Production in U(1)' at the LHC

TL;DR

This paper investigates the production and decay of neutralinos and charginos in a U(1)' supersymmetric model at the LHC, highlighting the model's unique neutralino sector and potential experimental signatures.

Contribution

It introduces a U(1)' supersymmetric model with a rich neutralino sector and systematically analyzes its collider signatures at the LHC, including detailed decay modes and background considerations.

Findings

Nine neutralino states in the model.

Distinctive final state signatures at the LHC.

Strategies to distinguish this model from others.

Abstract

We examine the production and the decay modes of neutralinos and charginos in a softly-broken supersymmetric model with an extra Abelian symmetry U(1)'. We perform the study in a U(1)' model with a secluded sector, where the tension between the electroweak scale and developing a large enough mass for Z' is resolved by incorporating three additional SU(2) singlet fields into the model. Although the chargino sector is the same as in the MSSM, the neutralino sector of the model is very rich: five new fermion fields are added to the neutral sector bring the total neutralino states to nine. We implement the model into standard packages and perform a detailed and systematic analysis of production and decay modes at the LHC, for three different scenarios, and concentrating on final signals (1) 1 lepton+jets +MET, (2) 2 leptons+jets +MET and (3) 3 lepton+0jets +MET, and comment on the case with 0 lepton+jets +MET. We discuss backgrounds and indicate how these signals can be observed, and how the model can be distinguished from other supersymmetric model scenarios.