Electroweakino constraints from LHC data

TL;DR

This paper analyzes how current LHC searches constrain the MSSM electroweakinos, focusing on a simplified parameter space with decoupled superpartners, and finds that LHC limits surpass LEP only for certain Bino mass ranges, impacting dark matter and baryogenesis models.

Contribution

It provides a comprehensive analysis of LHC constraints on MSSM electroweakinos in a simplified model, extending previous limits and exploring implications for dark matter and baryogenesis.

Findings

LHC constraints exceed LEP limits for Bino mass below ~150 GeV.

The analysis covers all relevant production and decay channels.

Implications for MSSM dark matter and electroweak baryogenesis are discussed.

Abstract

We investigate the sensitivity of existing LHC searches to the charginos and neutralinos of the MSSM when all the other superpartners are decoupled. In this limit, the underlying parameter space reduces to a simple four-dimensional set $\{M_1,\,M_2,\,\mu,\,\tan\beta\}$. We examine the constraints placed on this parameter space by a broad range of LHC searches taking into account the full set of relevant production and decay channels. We find that the exclusions implied by these searches exceed existing limits from LEP only for smaller values of the Bino mass $M_1 \lesssim 150$ GeV. Our results have implications for MSSM dark matter and electroweak baryogenesis.