Preheating in Palatini Higgs inflation

Research output: Contribution to journalArticleScientificpeer-review

Abstract

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.
Original languageEnglish
Article number021
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number4
Number of pages22
ISSN1475-7516
DOIs
Publication statusPublished - 12 Apr 2019
MoE publication typeA1 Journal article-refereed

Bibliographical note

21 pages, 6 figures

Fields of Science

  • hep-ph
  • astro-ph.CO
  • gr-qc
  • 114 Physical sciences

Cite this

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abstract = "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.",
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author = "{Rubio Pena}, Javier and Tomberg, {Eemeli S.}",
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Preheating in Palatini Higgs inflation. / Rubio Pena, Javier; Tomberg, Eemeli S.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2019, No. 4, 021, 12.04.2019.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Preheating in Palatini Higgs inflation

AU - Rubio Pena, Javier

AU - Tomberg, Eemeli S.

N1 - 21 pages, 6 figures

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N2 - 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.

AB - 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.

KW - hep-ph

KW - astro-ph.CO

KW - gr-qc

KW - 114 Physical sciences

U2 - 10.1088/1475-7516/2019/04/021

DO - 10.1088/1475-7516/2019/04/021

M3 - Article

VL - 2019

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

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