Identifying the colour of TeV-scale resonances

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 2TeV resonance can be identified with 10 fb-1 of data at a centre-of-mass energy of 14TeV for a wide range of couplings, but only if the uncertainty in the theoretical prediction is dramatically reduced from its current level. © SISSA 2012.