Electroweak phase transition in a model with gauged lepton number

TL;DR

This paper investigates the electroweak phase transition within a gauged lepton number model, highlighting the role of vector-like leptons and identifying conditions for a strong transition.

Contribution

It introduces a gauged lepton number model with vector-like leptons and analyzes their impact on the electroweak phase transition, revealing limited scenarios for a strong transition.

Findings

The model can produce a strong electroweak phase transition.

Vector-like leptons are crucial for anomaly cancellation and influence the transition.

Strong transition occurs only in limited parameter cases.

Abstract

In this work we study the electroweak phase transition in a model with gauged lepton number. Here, a family of vector-like leptons is required in order to cancel the gauge anomalies. Furthermore, these leptons can play an important role in the transition process. We find that this framework is able to provide a strong transition, but only for a very limited number of cases.