Vacuum decay constraints on the Higgs curvature coupling from inflation

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 acc...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2021-03, Vol.2021 (3), p.77
Main Authors: Mantziris, Andreas, Markkanen, Tommi, Rajantie, Arttu
Format: Article
Language:English
Subjects:
Coupling
Curvature
Decay
Lower bounds
Quarks
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Summary: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 ξ≳ 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.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2021/03/077