Warm Inflation with the Standard Model
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1.
California Institute of Technology
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2.
Université Catholique de Louvain
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3.
Excellence Cluster Universe
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4.
Ludwig-Maximilians-Universität München
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5.
Max Planck Institute for Physics
Abstract
We show for the first time that warm inflation is feasible with standard model (SM) gauge interactions alone. Our model consists of a minimal extension of the SM by a single scalar inflaton field with an axionlike coupling to gluons and a monomial potential. The effects of light fermions, which were previously argued to render warm inflation with the SM impossible, are alleviated by Hubble dilution of their chiral chemical potentials. Our model features only one adjustable combination of parameters and accommodates all inflationary observables. We briefly discuss implications for axion experiments, dark matter, and the strong C P problem.
Copyright and License
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Acknowledgement
We are grateful to Mikko Laine, Alica Rogelj, and Mikhail Shaposhnikov for their valuable comments on the manuscript. K. V. B. thanks the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award No. DE-SC0011632 and the Walter Burke Institute for Theoretical Physics. The work of M. D. was partially funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—SFB 1258–283604770. The work of S. Z. was supported by the European Research Council Gravites Horizon Grant AO No. 850 173-6. Funded by the European Union.
Data Availability
The data that support the findings of this article are not publicly available. The data are available from the authors upon reasonable request.
Additional Information
Views and opinions expressed are, however, those of the authors only and do not necessarily reflect those of the European Union or European Research Council. Neither the European Union nor the granting authority can be held responsible for them.
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Additional details
Related works
- Is new version of
- Discussion Paper: arXiv:2503.18829 (arXiv)
Funding
- United States Department of Energy
- DE-SC0011632
- California Institute of Technology
- Walter Burke Institute for Theoretical Physics -
- Deutsche Forschungsgemeinschaft
- 1258–283604770
- European Research Council
- 850 173-6
- European Commission
- SCOAP3
Dates
- Accepted
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2025-09-09