Work

Electroweak vacuum lifetime in two Higgs doublet models

Year: 2018

Type: article

Abstract: We study the stability of neutral electroweak vacua in two Higgs doublet models, and calculate the lifetime of these states when the parameters are such that they are false vacua. As the two Higgs doublet model is invariant under a sign change of both doublets, degenerate true vacua exist. It is shown that this degeneracy, despite the fact that each of these minima locally describes the same physics, can immensely affect their lifetime. We apply these calculations to the parameter space of the models which is allowed by recent LHC searches, and infer combinations of parameters which should be excluded on grounds of a tunneling time inferior to the age of the universe.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep11(2018)107

Authors: V. Branchina, F. Contino, P. M. Ferreira

Institutions: University of Catania, Istituto Nazionale di Fisica Nucleare, Sezione di Catania, University of Lisbon, Universidade Politécnica de Lisboa, Centro de Física Teórica e Computacional

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funder: CERN

OpenAlex ID: W2884409804