Preheating in Palatini Higgs inflation

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.

21 pages, 6 figures

References in corpus (17)

• The Standard Model Higgs boson as the inflaton
• Higgs inflation: consistency and generalisations
• Power-counting and the Validity of the Classical Approximation During Inflation
• On Inflation with Non-minimal Coupling
• Inflation with Non-Minimal Coupling: Metric vs. Palatini Formulations
• Higgs inflation at the critical point
• On Effective Degrees of Freedom in the Early Universe
• Higgs-Palatini Inflation and Unitarity
• Higgs inflation with loop corrections in the Palatini formulation
• Violent Preheating in Inflation with Nonminimal Coupling
• Gravitational perturbations from oscillons and transients after inflation
• Minimal Higgs inflation with an $R^2$ term in Palatini gravity
• Remarks on Higgs Inflation
• Dissipative Effects on Reheating after Inflation
• Parametric Resonance in the Early Universe - A Fitting Analysis
• How Well Can Future CMB Missions Constrain Cosmic Inflation?
• Inflationary dynamics and preheating of the non-minimally coupled inflaton field in the metric and Palatini formalisms

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• Palatini Higgs inflation and the refined dS conjecture
• Q-balls in Non-Minimally Coupled Palatini Inflation and their Implications for Cosmology
• Higgs-Dilaton Inflation in Einstein-Cartan gravity