2018/07/31 by V. Branchina, F. Contino, P. M. Ferreira · 1 citation
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Degenerate energy levels #Electroweak interaction #False vacuum #Higgs boson #Invariant (physics) #Large Hadron Collider #Maxima and minima #Parameter space #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Two-Higgs-doublet model #hep-ph
paper · pdf · doi:10.1007/jhep11(2018)107
23 pages, 7 figures
openalex created_date 2018/08/03 · arxiv created 2018/10/30 · openalex publication_date 2018/11/01 · arxiv updated 2018/12/05 · openalex updated_date 2026/08/05
A bstract 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.