Flavour Non-Universality and Higgs Compositeness

TL;DR

This paper proposes a model combining flavour non-universality with Higgs compositeness, predicting new TeV-scale gauge bosons and a naturally light Higgs arising from strong dynamics, with testable collider signatures.

Contribution

It introduces a novel extension of the Standard Model with non-universal gauge interactions and a composite Higgs as a pseudo Nambu-Goldstone boson, addressing electroweak symmetry breaking.

Findings

Predicted TeV-scale flavoured gauge bosons accessible at colliders

Demonstrated how Higgs potential tuning can be achieved in this framework

Provided phenomenological implications for upcoming collider experiments

Abstract

We present a flavour non-universal extension of the Standard Model combined with the idea of Higgs compositeness. At the TeV scale, the gauge groups $SU(2)_R$ and $U(1)_{B-L}$ are assumed to act in a non-universal manner on light- and third-generation fermions, while the Higgs emerges as a pseudo Nambu-Goldstone boson of the spontaneous global symmetry breaking $Sp(4)\to SU(2)_L\times SU(2)_R^{[3]}$, attributed to new strong dynamics. We discuss how the radiatively generated Higgs potential has the ingredients to realize the unavoidable tuning necessary to separate electroweak and composite scales. In particular, the flavoured gauge bosons resulting from the deconstruction must lie in the vicinity of the TeV scale, thereby providing interesting phenomenology that can be probed at near future colliders.