Constrained Vector-like quark model with perturbative unitarity

TL;DR

This paper introduces a vector-like quark model constrained by perturbative unitarity, deriving sum rules for couplings and analyzing phenomenological implications for LHC searches, especially in charged decay channels.

Contribution

It presents a novel VLQ model with coupling relations from unitarity constraints and explores its phenomenology for collider detection strategies.

Findings

Model predicts specific coupling structures and sum rules.

Upcoming LHC run 3 could detect these particles with adapted search strategies.

Wide resonances in charged channels are the main decay modes.

Abstract

We propose a Vector-like quark (VLQ) model constrained by the requirement of perturbative unitarity. In this scenario, the neutral and charged couplings of the new heavy VLQs to SM quarks and bosons are strictly related. We derive the corresponding sum rules and display the definite structure of the couplings. We analyse, qualitatively, the phenomenological consequences of this model in terms of expected width, production mechanism and decay channels. We show that the upcoming LHC run 3 could have sensitivity to such particles but the search strategy should be adapted to cover wide resonances decaying mainly in the charged channel T(B) -> Wq.