Higgs-Inflaton Mixing and Vacuum Stability

Yohei Ema, Mindaugas Karciauskas, Oleg Lebedev, Stanislav Rusak, Marco Zatta

Research output: Contribution to journalArticleScientificpeer-review


The quartic and trilinear Higgs field couplings to an additional real scalar are renormalizable, gauge and Lorentz invariant. Thus, on general grounds, one expects such couplings between the Higgs and an inflaton in quantum field theory. We find that the often omitted trilinear interaction is only weakly constrained by cosmology and could stabilize the electroweak vacuum by increasing the Higgs self coupling. The consequent Higgs-inflaton mixing can be as large as order one making a direct inflaton search possible at the LHC. (C) 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.

Original languageEnglish
JournalPhysics Letters B
Pages (from-to)373-377
Number of pages5
Publication statusPublished - 10 Feb 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • Higgs, inlation

Cite this