Testing a dynamical origin of Standard Model fermion masses

TL;DR

This paper proposes a method to distinguish different origins of Standard Model fermion masses by analyzing the couplings of composite pseudoscalar resonances to top quarks, providing testable predictions at the LHC.

Contribution

It introduces a novel approach to differentiate between high-scale Extended-Technicolor, partial compositeness, and low-scale mass generation mechanisms through collider signatures.

Findings

Couplings of pseudoscalar resonances can reveal fermion mass origins.

Different mass generation mechanisms produce distinct collider signatures.

The approach is applicable to LHC searches for new physics.

Abstract

We discuss a test of the Standard Model fermion mass origin in models of dynamical electroweak symmetry breaking. The couplings of composite pseudoscalar resonances to top quarks allow to distinguish high-scale Extended-Technicolor-type fermion mass generation from fermion partial compositeness and low-scale mass generation via an induced vacuum expectation value of a doublet coupled to the composite sector. These different possible origins of fermion masses are thus accessible via weak-scale physics searched for at the LHC.