Vacuum decay constraints on the Higgs curvature coupling from inflation

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 $\xi \gtrsim 0.051\dots 0.066$ 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.

22 pages, 5 figures, v3: Accepted for publication on JCAP, minor typos fixed

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Cited by in corpus (2)

• Higgstory repeats itself
• The effective Higgs potential and vacuum decay in Starobinsky inflation