Higgs-inflaton coupling from reheating and the metastable Universe

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Gross , C , Lebedev , O & Zatta , M 2016 , ' Higgs-inflaton coupling from reheating and the metastable Universe ' Physics Letters B , vol. 753 , pp. 178-181 . DOI: 10.1016/j.physletb.2015.12.014

Title: Higgs-inflaton coupling from reheating and the metastable Universe
Author: Gross, Christian; Lebedev, Oleg; Zatta, Marco
Contributor: University of Helsinki, Particle Physics and Astrophysics
University of Helsinki, Department of Physics
University of Helsinki, Particle Physics and Astrophysics
Date: 2016-02-10
Language: eng
Number of pages: 4
Belongs to series: Physics Letters B
ISSN: 0370-2693
URI: http://hdl.handle.net/10138/160981
Abstract: Current Higgs boson and top quark data favor metastability of our vacuum which raises questions as to why the Universe has chosen an energetically disfavored state and remained there during inflation. In this Letter, we point out that these problems can be solved by a Higgs-inflaton coupling which appears in realistic models of inflation. Since an inflaton must couple to the Standard Model particles either directly or indirectly, such a coupling is generated radiatively, even if absent at tree level. As a result, the dynamics of the Higgs field can change dramatically. (C) 2015 The Authors. Published by Elsevier B.V.
Subject: ELECTROWEAK VACUUM
STABILITY
114 Physical sciences
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