A Simple Mass Reconstruction Technique for SUSY particles at the LHC

TL;DR

This paper presents a straightforward method for reconstructing supersymmetric particle masses at the LHC by utilizing invariant mass endpoints from decay products, demonstrated with MSSM neutralino and chargino examples.

Contribution

It introduces a simple mass reconstruction technique based on invariant mass endpoints applicable to SUSY particles at the LHC.

Findings

Effective mass reconstruction near invariant mass endpoints

Application to MSSM neutralino and chargino mass determination

Potential for improved SUSY particle mass measurements

Abstract

It is often true that an invariant mass constructed from visible decay products of a heavy particle may attain a maximum(or minimum) for a certain kinematic configuration only -- this fact can be used to reconstruct relevant particle masses from observed decay product momenta of events near the invariant mass endpoint. MSSM neutralino and chargino mass reconstruction at the LHC from multi-lepton endstates is illustrated by way of example.