Viability of warm inflation with standard model interactions

Abstract

The minimal warm inflation scenario proposed in Ref. [1] -- featuring an axionlike inflaton coupled to Standard Model (SM) gluons via the standard interaction $\varphi G\tilde{G}$ -- offers a compelling bridge between inflationary dynamics and SM particle content. While the model retains only the inflaton as a beyond-SM field, its original analysis relied on some approximate treatments of warm inflation's (WI) dynamics. Here, we revisit this scenario using WI2easy, a precision computational tool for WI dynamics [2], to rigorously evaluate the model's viability and full range of model's parameters compatible with the observational parameters. Overall, we find that the results of Ref. [1] hold, but with significant differences in the weak and strong dissipative regimes of WI.

9 pages, 5 figures. Replaced with version matching the published one

References in corpus (8)

• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Warm Inflation and its Microphysical Basis
• The Sphaleron Rate in SU(N) Gauge Theory
• Power spectrum for inflation models with quantum and thermal noises
• Thermal axion production in the primordial quark-gluon plasma
• Recent developments in warm inflation
• Theory of non-Gaussianity in warm inflation
• Shape of the hot topological charge density spectral function