Vacuum decay constraints on the Higgs curvature coupling from inflation

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Mantziris , A , Markkanen , T & Rajantie , A 2021 , ' Vacuum decay constraints on the Higgs curvature coupling from inflation ' , Journal of Cosmology and Astroparticle Physics , no. 3 , 077 . https://doi.org/10.1088/1475-7516/2021/03/077

Title: Vacuum decay constraints on the Higgs curvature coupling from inflation
Author: Mantziris, Andreas; Markkanen, Tommi; Rajantie, Arttu
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2021-03
Language: eng
Number of pages: 22
Belongs to series: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
URI: http://hdl.handle.net/10138/330866
Abstract: We derive lower bounds for the Higgs-curvature coupling from vacuum stability during inflation in three inflationary models: quadratic and quartic chaotic inflation, and Starobinsky-like power-law inflation. In contrast to most previous studies we take the time-dependence of the Hubble rate into account both in the geometry of our past light-cone and in the Higgs effective potential, which is approximated with three-loop renormalisation group improvement supplemented with one-loop curvature corrections. We find that in all three models, the lower bound is ξgsim 0.051... 0.066 depending on the top quark mass. We also demonstrate that vacuum decay is most likely to happen a few e-foldings before the end of inflation.
Subject: 114 Physical sciences
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