Identifying the colour of TeV-scale resonances

TL;DR

This paper proposes a method to determine the colour charge of TeV-scale resonances decaying into top quark pairs by analyzing how the cross-section depends on a central jet veto, with simulations supporting its feasibility.

Contribution

It introduces a novel approach using jet veto dependence to identify the colour of new resonances and implements relevant simulations in Pythia8 for this purpose.

Findings

Colour of a 2 TeV resonance can be identified with 10/fb data at 14 TeV

Identification is possible across various couplings with reduced theoretical uncertainties

Simulation tools for resonance production were developed and validated

Abstract

We explore how the colour of any new TeV-scale resonances that decay into top quark pairs can be identified by studying the dependence of the observed cross-section on a central jet veto. To facilitate this study, colour octet resonance production was implemented in Pythia8 and colour singlet resonance production is simulated after minor modifications. We find that the colour of a 2 TeV resonance can be identified with 10/fb of data at a centre-of-mass energy of 14 TeV for a wide range of couplings, but only if the uncertainty in the theoretical prediction is dramatically reduced from its current level.