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Higgs-inflaton mixing and vacuum stability
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
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Number of Authors: 52019 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 789, p. 373-377Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2019. Vol. 789, p. 373-377
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Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-166723DOI: 10.1016/j.physletb.2018.10.074ISI: 000457165400051OAI: oai:DiVA.org:su-166723DiVA, id: diva2:1296970
Available from: 2019-03-18 Created: 2019-03-18 Last updated: 2019-03-18Bibliographically approved

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Rusak, Stanislav
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