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Viability of warm inflation with standard model interactions

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arxiv 2504.20943 v2 pith:OPQMX6Y6 submitted 2025-04-29 hep-ph astro-ph.COgr-qchep-th

Rudnei O. Ramos , Gabriel S. Rodrigues This is my paper · ORCID
classification hep-phastro-ph.COgr-qchep-th
keywords modeldynamicsinflationstandardwarminflatonparametersscenario
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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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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 12 citations worldwide. Full citation record

  1. Heterotic Warm Inflation

    hep-th 2025-09 conditional novelty 7.0 of 10

    In a heterotic-string-inspired two-field warm inflation model, the axion drives inflation while thermal corrections from gauge fields block sustained dilaton-driven inflation.

  2. CMB constraints on $U(1)$ axion warm inflation

    astro-ph.CO 2025-07 conditional novelty 4.0 of 10

    Axion-driven warm inflation with U(1) gauge fields is constrained with CMB data and remains viable for sub-Planckian decay constants, but requires large Chern-Simons couplings.

  3. From inflation to hot big bang -- a tutorial on cosmological perturbations

    hep-ph 2026-07 accept novelty 1.0 of 10

    A tutorial deriving cosmological perturbation equations from inflation through reheating, with explicit gauge-invariant computations and Python scripts.

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