Vector-like Fermions in a Minimal Composite Higgs Model

TL;DR

This paper investigates a minimal composite Higgs model featuring vector-like fermions, analyzing how these resonances influence electroweak constraints and Higgs production, with implications for collider phenomenology.

Contribution

It introduces a two-site composite Higgs model with non-local terms and studies the impact of vector-like fermions on electroweak precision tests and Higgs production rates.

Findings

Gluon fusion Higgs production is suppressed by about 6% compared to the Standard Model.

Electroweak and unitarity bounds constrain the model parameters.

Composite vector-like fermions significantly affect oblique parameters.

Abstract

We consider the scenario where the composite Higgs arising as a pNGB in a two-site model with a non-local term included. Constraints from pion scattering and electroweak precision test are considered. We discuss the effects of composite resonances, in particular the one from composite vector-like fermions, on the oblique parameters. It is noticed that the gluon fusion production of Higgs boson is suppressed with respect to the Standard Model for about $6\%$ after imposing the unitarity and electroweak bounds.