Electroweak Vacuum Stabilized by Moduli during/after Inflation
arXiv:1605.07342 · doi:10.1016/j.physletb.2016.08.046
Abstract
It is known that the present electroweak vacuum is likely to be metastable and it may lead to a serious instability during/after inflation. We propose a simple solution to the problem of vacuum instability during/after inflation. If there is a moduli field which has Planck-suppressed interactions with the standard model fields, the Higgs quartic coupling in the early universe naturally takes a different value from the present one. A slight change of the quartic coupling in the early universe makes the Higgs potential absolutely stable and hence we are free from the vacuum instability during/after inflation.
6 pages, 2 figures; v2: references added