Implication of a Quasi Fixed Point with a Heavy Fourth Generation: The emergence of a TeV-scale physical cutoff

TL;DR

This paper explores a TeV-scale quasi fixed point in the Standard Model with a heavy fourth generation, suggesting a dynamical mechanism for electroweak symmetry breaking and a potential new fundamental scale.

Contribution

It introduces the concept of a TeV-scale physical cutoff arising from a quasi fixed point, with implications for dynamical symmetry breaking and scale symmetry restoration.

Findings

Existence of a TeV-scale quasi fixed point in the SM with a heavy fourth generation

Formation of bound states and condensates near the fixed point

Potential for a deeper theory beyond the Standard Model at this scale

Abstract

It has been shown in a recent paper that the Higgs quartic and Yukawa sectors of the Standard Model (SM) with a heavy fourth generation exhibit at a two-loop level a quasi fixed point structure instead of the one-loop Landau singularity and which could be located in the TeV region, a scale which is denoted by $\Lambda_{FP} $ in this paper. This provides the possibility of the existence of a TeV-scale physical cutoff endowed with several implications. In the vicinity of this quasi fixed point bound states and Higgs-like condensates made up of the 4th generation quarks and leptons get formed. It implies the possibility of a dynamical electroweak symmetry breaking generated by 4th generation condensates. The quasi fixed points also hint at at a possible restoration of scale symmetry at $\Lambda_{FP} $ and above and the emergence of a theory which could be deeper than the SM.