Avoiding Death by Vacuum

3rd Symposium on Prospects in the Physics of Discrete Symmetries

Barroso, A.^1 ; Ferreira, P.M.^1,2 ; Ivanov, I.^3,4 ; Santos, R.^1,2 ; Silva, João P.^2

Centro de Física Teórica e Computacional, Faculdade de Ciencias, Universidade de Lisboa, Av. Prof. Gama Pinto 2, 1649-003 Lisboa, Portugal^1

Instituto Superior de Engenharia de Lisboa, 1959-007 Lisboa, Portugal^2

IFPA, Université de Liége, Allée du 6 Aout 17, batiment B5a, 4000 Liége, Belgium^3

Sobolev Institute of Mathematics, Koptyug avenue 4, 630090, Novosibirsk, Russia^4

关键词: Analytical bounds;    Global minima;    Higgs doublet models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/447/1/012051/pdf
DOI  :  10.1088/1742-6596/447/1/012051

来源: IOP

【 摘 要 】

The two-Higgs doublet model (2HDM) can have two electroweak breaking, CP-conserving, minima. The possibility arises that the minimum which corresponds to the known elementary particle spectrum is metastable, a possibility we call the "panic vacuum". We present analytical bounds on the parameters of the softly broken Peccei-Quinn 2HDM which are necessary and sufficient conditions to avoid this possibility. We also show that, for this particular model, the current LHC data already tell us that we are necessarily in the global minimum of the theory, regardless of any cosmological considerations about the lifetime of the false vacua.