Fourth Generation -- Towards Effect of Large Yukawa Coupling

TL;DR

This paper explores the implications of a hypothetical fourth generation of particles, focusing on CP violation's role in baryon asymmetry and the impact of large Yukawa couplings on electroweak symmetry breaking, based on experimental bounds.

Contribution

It provides a comprehensive discussion on the effects of a 4th generation on CP violation and direct search bounds, linking experimental results to theoretical implications.

Findings

Constraints on $m_{t'}$ and $m_{b'}$ from experiments

Potential for electroweak symmetry breaking via large Yukawa couplings

Insights into CP violation's role in baryogenesis

Abstract

In this talk we cover two threads regarding the 4th generation: on CP violation, from Earth up to the Heavens, i.e. from accelerator-based experimental studies, towards baryon asymmetry of the Universe; and on direct search bounds on $m_{t'}$ and $m_{b'}$, towards the possibility of electroweak symmetry breaking through large Yukawa couplings. Prospects and discussions are presented.