Impact of a colored vector resonance on the collider constraints for top-like top partner

TL;DR

This paper reevaluates collider constraints on top-like vectorlike top partners by considering the effects of exotic colored vector resonances, using recent LHC data and advanced resonance modeling.

Contribution

It introduces a comprehensive analysis of collider constraints including the impact of broad colored vector resonances beyond the narrow-width approximation.

Findings

Constraints on top partner models are tightened by considering resonance width effects.

Exotic colored vector resonances significantly modify collider bounds.

The analysis provides updated parameter space limits for models with strong electroweak symmetry breaking sectors.

Abstract

In this work we reappraise the collider constraints from leptonic final states on the vectorlike colored top partners taking into account the impact of exotic colored vector resonances. These colored states are intrinsic to a broad class of models that employ a strongly interacting sector to drive electroweak symmetry breaking. We translate the recent results in the {\sl monolepton + jets} channel as reported by CMS with an integrated luminosity of 35.8 fb$^{-1}$, and {\sl dilepton + jets} and {\sl trilepton + jets} channels as reported by ATLAS with an integrated luminosity of 36.1 fb$^{-1}$ to constrain the parameter space of these class of models. We also comment on the impact and modification of the derived constraints due to the expected fatness of the colored vector resonance, when accounted for beyond the narrow-width approximation by simulating the full one-particle irreducible resummed propagator.