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- W3044888935 abstract "We study how higher-order gravity affects Higgs inflation in the Palatini formulation. We firstreview the metric and Palatini formulations in comparative manner and discuss their differences.Next cosmic inflation driven by a scalar field and inflationary observables are discussed. After thiswe review the Higgs inflation and compute the inflationary observables both in the metric andPalatini formulations. We then consider adding higher-order terms of the curvature to the action.We derive the equations of motion for the most general action quadratic in the curvature that doesnot violate parity in both the metric and Palatini formulations. Finally we present a new result. Weanalyse Higgs inflation in the Palatini formulation with higher-order curvature terms. We considera simplified scenario where only terms constructed from the symmetric part of the Ricci tensor areadded to the action. This implies that there are no new gravitational degrees of freedom, whichmakes the analysis easier. As a new result we found out that the scalar perturbation spectrumis unchanged, but the tensor perturbation spectrum is suppressed by the higher-order curvaturecouplings." @default.
- W3044888935 created "2020-07-29" @default.
- W3044888935 creator A5049619349 @default.
- W3044888935 date "2020-06-04" @default.
- W3044888935 modified "2023-09-28" @default.
- W3044888935 title "Higgs inflation and higher-order gravity in Palatini formulation" @default.
- W3044888935 hasPublicationYear "2020" @default.
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