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arXiv · 2402.08849

Chromo-natural warm inflation

Ann Mukuno·Jiro Soda
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Abstract

Chromo-natural inflation is a model where non-abelian gauge fields are sustained by the coupling of the axion with the gauge field through the Chern-Simons term. While minimal warm inflation is a model where the axion produces a thermal bath of non-abelian gauge particles through the Chern-Simons term. Since both axion inflation models are based on the same action, a natural question is if those are compatible or not. We study axion inflation with the Chern-Simons term and find that chromo-natural inflation can accommodate radiation with a temperature much larger than the Hubble parameter during inflation, which is a characteristic feature of warm inflation. Thus, we conclude that chromo-natural warm inflation exists, which must have phenomenologically interesting consequences.

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Ann Mukuno, Jiro Soda. 2024-02-13. Chromo-natural warm inflation. https://arxiv.org/abs/2402.08849

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