Handling jets + missing E_T channel using inclusive mT2

TL;DR

This paper introduces a new mT2-based variable for analyzing jets and missing transverse energy in LHC data, enabling simultaneous determination of squark and gluino masses early in experiments.

Contribution

It proposes the subsystem mT2 variable that improves mass measurements of supersymmetric particles in complex collider events.

Findings

The subsystem mT2 variable is sensitive to gluino mass.

Simultaneous determination of squark and gluino masses is possible.

Monte Carlo simulations validate the method's effectiveness.

Abstract

The ATLAS and CMS experiments at the Large Hadron Collider (LHC) may discover the squarks (\tilde{q}) and gluino (\tilde{g}) of the minimal supersymmetric standard model (MSSM) in the early stage of the experiments if their masses are lighter than 1.5 TeV. In this paper we propose the sub-system m_{T2} variable, which is sensitive to the gluino mass when m_{\tilde{q}}>m_{\tilde{g}}. Using it with the inclusive m_{T2} distribution proposed earlier, \tilde{q} and \tilde{g} masses can be determined simultaneously in the early stage of the experiments. Results of Monte Carlo simulations at sample MSSM model points are presented both for signal and background.