Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 021 |
---|---|
<mark>Journal publication date</mark> | 12/04/2019 |
<mark>Journal</mark> | Journal of Cosmology and Astroparticle Physics |
Issue number | 4 |
Volume | 2019 |
Publication Status | Published |
<mark>Original language</mark> | English |
We study the details of preheating in Palatini Higgs inflation. We show, that contrary to what happens in the metric formulation of the model, the Universe does not reheat through the creation of gauge bosons only, but also through the tachyonic production of Higgs excitations. The latest entropy production channel turns out to be very efficient and leads to an almost instantaneous onset of radiation domination after the end of inflation. As compared to the metric case, this reduces the number of e-folds needed to solve the usual hot big bang problems while leading to a smaller spectral index for the primordial spectrum of density perturbations.