Mixing with vector-like quarks: constraints and expectations

TL;DR

This paper discusses the theoretical expectations and naturalness of mixing between vector-like quarks and the third generation, analyzing constraints and implications for particle physics models.

Contribution

It provides a detailed analysis of why vector-like quarks are expected to mix mainly with the third generation and evaluates the naturalness and size of this mixing.

Findings

Vector-like quarks predominantly mix with the third generation.

The expected mixing size is constrained by naturalness considerations.

Implications for experimental searches of vector-like quarks.

Abstract

We argue why vector-like quarks are usually expected to mix predominantly with the third generation, and discuss about the expected size of this mixing and its naturalness.