Gluino Stransverse Mass

TL;DR

The paper proposes the gluino stransverse mass, a new observable based on the $m_{T2}$ variable, to measure gluino, neutralino, and squark masses in proton-proton collisions, aiding experimental sparticle mass pattern analysis.

Contribution

It introduces the gluino stransverse mass, extending the $m_{T2}$ method to analyze gluino pair production and decay, enabling mass measurements of key supersymmetric particles.

Findings

Gluino stransverse mass effectively measures gluino and neutralino masses.

It can also determine squark masses if lighter than gluinos.

Provides a new tool for experimental sparticle mass pattern exploration.

Abstract

We introduce a new observable, 'gluino stransverse mass', which is an application of the Cambridge $m_{T2}$ variable to the process where gluinos are pair produced in proton-proton collision and each gluino subsequently decays into two quarks and one LSP, $i.e. \tilde{g}\tilde{g} \to qq\tilde\chi_1^0\ qq\tilde\chi_1^0$. We show that the gluino stransverse mass can be utilized to measure the gluino and the lightest neutralino masses separately, and also the (1st and 2nd generation) squark masses if lighter than the gluino mass, thereby providing a good first look at the pattern of sparticle masses experimentally.