New techniques for chargino-neutralino detection at LHC

TL;DR

This paper introduces a novel kinematic analysis method for detecting chargino-neutralino pairs at the LHC, enhancing the ability to distinguish SUSY signals from Standard Model backgrounds, especially at high luminosity.

Contribution

It presents a new technique based on analyzing the poles of a kinematic variable to improve chargino-neutralino detection at the LHC, complementing existing methods.

Findings

Method improves signal-to-background ratio

Can distinguish SUSY signals at 100/fb luminosity

Applicable to specific SUSY models

Abstract

The recent LHC discovery of a Higgs-like boson at 126 GeV has important consequences for SUSY, pushing the spectrum of strong-interacting supersymmetric particles to high energies, very difficult to probe at the LHC. This gives extra motivation to study the direct production of electroweak particles, as charginos and neutralinos, which are presently very poorly constrained. The aim of this work is to improve the analysis of chargino-neutralino pair production at LHC, focusing on the kinematics of the processes. We propose a new method based on the study of the poles of a certain kinematical variable. This complements other approaches, giving new information about the spectrum and improving the signal-to-background ratio. We illustrate the method in particular SUSY models, and show that working with the LHC at 100/fb luminosity one would be able to distinguish the SUSY signal from the Standard Model background.