Return of the technicolour

TL;DR

This paper proposes a Dark Technicolour framework with an extended hypothesis to generate fermion masses and address the Standard Model Flavor Problem through a hierarchical condensate structure and residual symmetries.

Contribution

It introduces a novel Dark Technicolour model with an extended Most Attractive Channel hypothesis, linking multiple strong sectors to naturally explain fermion mass hierarchies.

Findings

Hierarchical condensate structure revealed by the extended hypothesis

Model reduces to Froggatt-Nielsen or hierarchical VEV models at low energies

Provides a potential solution to the Standard Model Flavor Problem

Abstract

We discuss that conventional Technicolour dynamics can be revitalized within the Dark Technicolour paradigm by invoking the Extended Most Attractive Channel hypothesis. In this framework, Standard Model fermions acquire masses via multifermion chiral condensates arising from new strong dynamics. The model incorporates three confining gauge sectors, Technicolour, Dark Technicolour, and an intermediate QCD-like sector, linked through extended gauge symmetries. The Extended Most Attractive Channel hypothesis reveals a hierarchical structure of condensates, where channels with higher net chirality become increasingly attractive. At low energies, the Dark Technicolour paradigm naturally reduces to the Froggatt-Nielsen or Standard Hierarchical Vacuum Expectation Value model, governed by residual discrete symmetries, offering a compelling resolution to the Standard Model Flavor Problem.