Higgs inflation at the hilltop

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http://hdl.handle.net/10138/240777

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Enckell , V-M , Enqvist , K , Räsänen , S & Tomberg , E 2018 , ' Higgs inflation at the hilltop ' , Journal of Cosmology and Astroparticle Physics , vol. 2018 , no. 6 , 005 . https://doi.org/10.1088/1475-7516/2018/06/005

Title: Higgs inflation at the hilltop
Author: Enckell, Vera-Maria; Enqvist, Kari; Räsänen, Syksy; Tomberg, Eemeli
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
Date: 2018-06
Language: eng
Number of pages: 26
Belongs to series: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
URI: http://hdl.handle.net/10138/240777
Abstract: We study inflation with the non-minimally coupled Standard Model Higgs in the case when quantum corrections generate a hilltop in the potential. We consider both the metric and the Palatini formulation of general relativity. We investigate hilltop inflation in different parts of the Higgs potential and calculate predictions for CMB observables. We run the renormalization group equations up from the electroweak scale and down from the hilltop, adding a jump in-between to account for unknown corrections in the intermediate regime. Within our approximation, no viable hilltop inflation is possible for small field values, where the non-minimal coupling has no role, nor for intermediate field values. For large field values, hilltop inflation works. We find the spectral index to be n(s)
Subject: inflation
particle physics - cosmology connection
STANDARD MODEL HIGGS
GENERAL-RELATIVITY
RENORMALIZATION-GROUP
QUANTUM FLUCTUATIONS
SYMMETRY-BREAKING
CHAOTIC INFLATION
UNIVERSE SCENARIO
PHASE-TRANSITION
BOSON MASS
CONSTRAINTS
115 Astronomy, Space science
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