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Inflation and pseudo-Goldstone Higgs boson

By Tommi Alanne, Francesco Sannino, Tommi Tenkanen and Kimmo Tuominen

Abstract

We consider inflation within a model framework where the Higgs boson arises as a pseudo-Goldstone boson associated with the breaking of a global symmetry at a scale significantly larger than the electroweak one. We show that in such a model the scalar self-couplings can be parametrically suppressed and, consequently, the nonminimal couplings to gravity can be of order one or less, while the inflationary predictions of the model remain compatible with the precision cosmological observations. Furthermore, in the model we study, the existence of the electroweak scale is entirely due to the inflaton field. Our model therefore suggests that inflation and low energy particle phenomenology may be more entwined than assumed so far

Topics: STANDARD MODEL, FIELD, 115 Astronomy, Space science, STANDARD MODEL, FIELD, 115 Astronomy, Space science
Publisher: American Physical Society
Year: 2017
OAI identifier: oai:helda.helsinki.fi:10138/178985
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