The race for supersymmetry: using mT2 for discovery

TL;DR

This paper presents a simple, effective method using the mT2 variable to search for supersymmetric particles at the LHC, potentially enabling earlier discovery with less data.

Contribution

It introduces a novel event selection technique based solely on mT2, improving the sensitivity of supersymmetry searches over traditional methods.

Findings

Monte Carlo simulations show increased discovery potential for supersymmetry.

The method effectively discriminates against Standard Model backgrounds.

Potential to detect supersymmetry with less data or at lower energies.

Abstract

We describe how one may employ a very simple event selection, using only the kinematic variable mT2, to search for new particles at the LHC. The method is useful when searching for evidence of models (such as R-parity conserving supersymmetry) which have a Z2 parity and a weakly-interacting lightest parity-odd particle. We discuss the kinematic properties which make this variable an excellent discriminant against the great majority of Standard Model backgrounds. Monte Carlo simulations suggest that this approach could be used to discover supersymmetry with somewhat smaller integrated luminosities (or perhaps lower center-of-mass energies) than would be required for other comparable analyses.