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arXiv · 2504.20943

Viability of warm inflation with standard model interactions

Rudnei O. Ramos·Gabriel S. Rodrigues
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Abstract

The minimal warm inflation scenario proposed in Ref. [1] -- featuring an axionlike inflaton coupled to Standard Model (SM) gluons via the standard interaction $\phi G \tilde G$ -- 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.

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Rudnei O. Ramos, Gabriel S. Rodrigues. 2025-04-29. Viability of warm inflation with standard model interactions. https://doi.org/10.1103/wn1m-19gt

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