Phenomenology of Vector-like Fermions in Physics Beyond the Standard Model

TL;DR

This paper explores the phenomenology of vector-like fermions in theories addressing the hierarchy problem, focusing on their decay channels and detection prospects at current and future high-energy colliders.

Contribution

It provides a detailed analysis of vector-like fermion decay channels, especially into color octets, within models where the Higgs is a pseudo-Nambu-Goldstone boson.

Findings

Heavy fermions can decay into color octets at colliders.

Phenomenology studied for both LHC and future collider scenarios.

Implications for detecting new particles beyond the Standard Model.

Abstract

The Standard model of particle physics provides a successful theory to understand the experimental results of the electroweak and strong interactions. However, it does not have a satisfactory explanation for the hierarchy problem. Many extensions of the Standard Model that solve the hierarchy problem result in new particles. We will study the phenomenology of vector-like fermions resulting in theories where the Higgs boson is typically a pseudo-Nambu-Goldstone boson. In these theories we study the case where a heavy fermion will be heavier than a heavy gluon, and then the channel of a heavy fermion decaying into a color octet is considered. We study this phenomenology at high energy colliders, both the LHC as well as future machines.