Natural fourth generation of leptons

TL;DR

This paper explores the theoretical and experimental implications of a potential fourth generation of leptons, analyzing constraints from precision measurements and proposing search strategies at the LHC within the minimal walking technicolor model.

Contribution

It provides a comprehensive analysis of the constraints and signatures of a fourth lepton generation, including a specific application to the minimal walking technicolor model.

Findings

Constraints from electroweak precision data on fourth generation leptons

Predicted signatures for LHC searches for fourth generation leptons

Application of results to the minimal walking technicolor model

Abstract

We consider implications of a fourth generation of leptons, allowing for the most general mass patterns for the fourth generation neutrino. We determine the constraints due to the precision electroweak measurements and outline the signatures to search for at the LHC experiments. As a concrete framework to apply these results we consider the minimal walking technicolor (MWTC) model where the matter content, regarding the electroweak quantum numbers, corresponds to a fourth generation.