Nonminimally-coupled warm Higgs inflation: Metric vs. Palatini Formulations

Abstract

In this work, we study the non-minimally-coupled Higgs model in the context of warm inflation scenario on both metric and Palatini approaches. We particularly consider a dissipation parameter of the form $\Gamma =C_{T}T$ with $C_T$ being a coupling parameter and focus only on the strong regime of the interaction between inflaton and radiation fluid. We compute all relevant cosmological parameters and constrain the models using the observational Planck 2018 data. We discover that the $n_s$ and $r$ values are consistent with the observational bounds. Having used the observational data, we constrain a relation between $\xi$ and $\lambda$ for the non-minimally-coupled warm Higgs inflation in both metric and Palatini cases. To produce $n_s$ and $r$ in agreement with observation, we find that their values are two orders of magnitude higher than those of the usual (cold) non-minimally-coupled Higgs inflation.

v2: 18 pages, many figures. version accepted for publication in Nuclear Physics Section B. arXiv admin note: text overlap with arXiv:1812.03107, arXiv:2110.03925 by other authors

References in corpus (4)

• The Standard Model Higgs boson as the inflaton
• Warm Inflation and its Microphysical Basis
• Inflation with Non-Minimal Coupling: Metric vs. Palatini Formulations
• Warm inflation dissipative effects: predictions and constraints from the Planck data

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• Cosmological constraints of Palatini $f(\mathcal{R})$ gravity
• First constraints on non-minimally coupled Natural and Coleman-Weinberg inflation and massive neutrino self-interactions with Planck+BICEP/Keck
• Inflation in Myrzakulov $F(R,T)$ Gravity: A Comparative Study in Metric, Symmetric Teleparallel, and Weitzenböck Formalisms
• Primordial non-Gaussianity in noncanonical warm inflation with nonminimal derivative coupling
• Dynamics of potential-free warm $\mathbf{k}$-inflation with nonminimal derivative coupling