Model Independent Search in 2-Dimensional Mass Space

TL;DR

This paper introduces a model-independent technique for detecting particles with unknown masses in events featuring missing energy, applicable to various new physics scenarios including heavy resonances and supersymmetric particles.

Contribution

It presents a novel method that relies solely on decay topology, enabling mass searches without specific model assumptions.

Findings

Effective in top pair decay events with neutrinos

Applicable to heavy resonance and heavy quark searches

Potential use in supersymmetric neutralino detection

Abstract

A model independent method to search for particles of unknown masses in events with missing energy is presented. The only assumption is the topology of the decay chain. The method is tested in events with top pairs decaying leptonically with the presence of two neutrinos in the final state. Possible applications are searches for a heavy resonance decaying to top pairs as well as next generation heavy quarks. Similar topologies are predicted by supersymmetric models with R-parity conservation resulting in final states with two invisible neutralinos.