The Higgsino-Singlino World at the Large Hadron Collider

TL;DR

This paper investigates the detection prospects of light higgsinos and singlinos in the NMSSM at the LHC, focusing on a trilepton signature to distinguish signal from background and establish exclusion limits.

Contribution

It introduces a detailed analysis of higgsino-singlino scenarios with specific decay modes, providing new exclusion regions for these particles at the LHC.

Findings

Exclusion regions mapped in the higgsino-singlino mass plane.

Simulation of signal and background for 14 TeV LHC.

Identification of trilepton signature as a key detection channel.

Abstract

We consider light higgsinos and singlinos in the next-to-minimal supersymmetric Standard Model at the Large Hadron Collider. We assume that the singlino is the lightest supersymmetric particle and that the higgsino is the next-to-lightest supersymmetric particle with the remaining supersymmetric particles in the multi-TeV range. This scenario, which is motivated by the flavor and CP issues, provides a phenomenologically viable dark matter candidate and improved electroweak fit consistent with the measured Higgs mass. Here, the higgsinos decay into on (off)-shell gauge boson and the singlino. We consider the leptonic decay modes and the resulting signature is three isolated leptons and missing transverse energy which is known as the trilepton signal. We simulate the signal and the Standard Model backgrounds and present the exclusion region in the higgsino-singlino mass plane at the Large Hadron Collider at $\sqrt{s}=14$ TeV for an integrated luminosity of 300 fb$^{-1}$.