Distinguishing Color-Octet and Color-Singlet Resonances at the Large Hadron Collider

TL;DR

This paper introduces a new variable to distinguish between color-octet and color-singlet resonances at the LHC, aiding in identifying the nature of new particles in di-jet resonance searches.

Contribution

The paper proposes a novel variable for differentiating color-octet and color-singlet resonances, applicable across various flavor scenarios and mass ranges at the LHC.

Findings

Effective distinction between resonance types at 14 TeV LHC

Applicable across flavor universal and non-universal models

Distinguishing capability improves with higher luminosity

Abstract

Di-jet resonance searches are simple, yet powerful and model-independent, probes for discovering new particles at hadron colliders. Once such a resonance has been discovered it is important to determine the mass, spin, couplings, chiral behavior and color properties to determine the underlying theoretical structure. We propose a new variable which, in the absence of decays of the resonance into new non-standard states, distinguishes between color-octet and color-singlet resonances. To keep our study widely applicable we study phenomenological models of color-octet and color-singlet resonances in flavor universal as well as flavor non-universal scenarios. We present our analysis for a wide range of mass (2.5 - 6 TeV), couplings and flavor scenarios for the LHC with center of mass energy of 14 TeV and varying integrated luminosities of 30, 100, 300 and 1000 ${\rm fb}^{-1}$. We find encouraging results to distinguish color-octet and color-singlet resonances for different flavor scenarios at the LHC.