Toponium Hunter's Guide

TL;DR

This paper explores methods to detect and characterize toponium production at the LHC, focusing on spin and colour observables in dilepton decay modes to identify potential signals of a spin-zero colour singlet state.

Contribution

It proposes multivariate analysis techniques for identifying toponium and distinguishes its properties using decay modes and observables, advancing the understanding of top quark bound states.

Findings

Potential evidence for spin-zero colour singlet toponium near the $t \bar t$ threshold.

Dilepton decay mode analysis can reveal spin and colour properties.

Semileptonic decay mode may show excess but is less useful for characterization.

Abstract

We address the discovery and characterisation of toponium production at the Large Hadron Collider. In the dilepton decay mode, multivariate analyses of spin and colour observables could provide evidence that an excess of events present near the $t \bar t$ threshold corresponds to a spin-zero colour singlet. The semileptonic decay mode may also exhibit an excess near threshold, but is not expected to play any role in the toponium characterisation.