Inclusive transverse mass analysis for squark and gluino mass determination

TL;DR

This paper introduces an inclusive method using the stransverse mass (m_{T2}) and a hemisphere algorithm to determine squark and gluino masses at the LHC, highlighting a cusp feature near the true LSP mass.

Contribution

The paper presents a novel inclusive analysis technique employing hemisphere grouping and m_{T2} to extract supersymmetric particle masses from LHC data.

Findings

The inclusive m_{T2} distribution exhibits a cusp near the true LSP mass.

The end point of the m_{T2} distribution provides information on the heaviest squark or gluino.

Monte Carlo simulations confirm the method's effectiveness in mass determination.

Abstract

We propose an inclusive analysis of a stransverse mass (m_{T2}) using a hemisphere method for supersymmetry studies at the LHC . The hemisphere method is an algorithm to group collinear and high p_T particles and jets, assuming that there are two of such groups in a event. The m_{T2} is defined as a function of the unknown LSP mass, two hemisphere momenta, and missing transverse momentum. The kinematical end point of the m_{T2} distribution provides information on the squark and gluino masses. We perform a Monte Carlo simulation to study the inclusive m_{T2} distribution at the LHC. We show that the end point of the inclusive m_{T2} distribution has a cusp-like structure around the true LSP mass. The knowledge of the expected kinematical behavior near the end point for true events is important to establish the end point of the inclusive distribution. We find that the inclusive analysis is useful to obtain the information on the heaviest of the squark/gluino.