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research article
Preheating in Palatini Higgs inflation on the lattice
September 1, 2022
We study preheating following Higgs inflation in the Palatini formulation of gravity. We numerically evolve perturbations of the radial mode of the Higgs field and that of three scalars modeling the gauge bosons. We compare the two non-perturbative mechanisms of growth of excitations - parametric resonance and tachyonic instability - and confirm that the latter plays the dominant role. Our results provide further evidence that preheating in Palatini Higgs inflation happens within a single oscillation of the Higgs field about the bottom of its potential, consistent with the approximation of an instantaneous preheating.
Type
research article
Web of Science ID
WOS:000858982900001
Authors
Publication date
2022-09-01
Publisher
Published in
Issue
9
Start page
015
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
October 10, 2022
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