Abstract
Toplike vector quarks arising from underlying strong sectors are expected to have large decay widths pushing them beyond the narrow width approximation. In this paper we consider a broad colored vector quark that strongly couples to an exotic pseudoscalar. We use the full 1PI resummed propagator for the exotic quark to recast the present LHC constraints ruling out masses below $\ensuremath{\sim}1.2(1.1)\text{ }\text{ }\mathrm{TeV}$ for width to mass ratio of 0.1(0.6). We utilize machine learning techniques that are demonstratively more efficient than traditional cut based searches to present the reach of HL-LHC on the parameter space of this broad resonance. We find that at $3\text{ }\text{ }{\mathrm{ab}}^{\ensuremath{-}1}$ the HL-LHC has a discovery potential up to 1.6 TeV dominated by the pair production channel. We study the feasibility of using machine learning techniques to analyze the broad resonance peaks expected from these exotic quarks at collider experiments like the LHC.
Highlights
Vectorlike quarks are motivated exotic states that arise in various extensions of the Standard Model (SM) [1]
The optimized cuts lead to ∼5% improvement in the reach of HL-Large Hadron Collider (LHC) on the parameter space compared to the ATLAS search [67]
In this paper we revisit the collider phenomenology of toplike vector quarks taking into account the effect of a large decay width
Summary
Vectorlike quarks are motivated exotic states that arise in various extensions of the Standard Model (SM) [1] If these states have nontrivial color charges they can represent optimistic new physics framework that can be discovered at a hadronic collider experiment like the Large Hadron Collider (LHC). In this paper we focus on the collider phenomenology of broad toplike vector quarks that arise from a strongly coupled sector. We consider that this broad vectorlike quark predominantly decays to a singlet pseudoscalar assumed to be a part of an underlying strong sector. We study the HL-LHC reach to probe the parameter space of the broad colored toplike vector quark in both the pair and single production channels. V we study the feasibility of an ML tool for the analysis broad resonances before concluding
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