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Completing natural inflation
Open accessAbstract
If the inflaton is a pseudo-scalar axion, the axion shift symmetry can protect the flatness of its potential from too large radiative corrections. This possibility, known as natural inflation, requires an axion scale which is greater than the (reduced) Planck scale. It is unclear whether such a high value is compatible with an effective field theoretical description, and whether the global axionic symmetry survives quantum gravity effects. We propose a mechanism which provides an effective large axion scale, although the original one is sub-Planckian. The mechanism is based on the presence of two axions, with a potential provided by two anomalous gauge groups. The effective large axion scale is due to an almost exact symmetry between the couplings of the axions to the anomalous groups. We also comment on a possible implementation in heterotic string theory.
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Cites
Particle physics models of inflation and the cosmological density perturbation
Lyth, D. H., & Riotto, A. (1999) · Physics Reports · doi:10.1016/s0370-1573(98)00128-8 · Cited by 2,064
Cited by
Riess, A. G., Strolger, L., Casertano, S., Ferguson, H. C., Mobasher, B., Gold, B., Challis, P. J., Filippenko, A. V., Jha, S., Li, W., et al. (2007) · The Astrophysical Journal · doi:10.1086/510378 · Cited by 1,758
Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets
Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., Balland, C., Barbary, K., Blanc, G., Challis, P. J., et al. (2008) · The Astrophysical Journal · doi:10.1086/589937 · Cited by 1,540
Planck 2013 results. XXII. Constraints on inflation
Planck Collaboration, Ade, P. A. R., Aghanim, N., Armitage-Caplan, C., Arnaud, M., Ashdown, M., Atrio-Barandela, F., Aumont, J., Baccigalupi, C., Banday, A. J., et al. (2014) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201321569 · Cited by 1,082
The Swampland: Introduction and Review
Palti, E. (2019) · Fortschritte der Physik · doi:10.1002/prop.201900037 · Cited by 908
Monodromy in the CMB: Gravity waves and string inflation
Silverstein, E., & Westphal, A. (2008) · Physical Review D · doi:10.1103/physrevd.78.106003 · Cited by 724
Metadata
- Authors
- Kim, J. E., Nilles, H. P., & Peloso, M.
- Venue
- Journal of Cosmology and Astroparticle Physics
- Publisher
- IOP Publishing
- Published
- 2005-01-12
- Volume
- 2005
- Issue
- 01
- Pages
- 005-005
- ISSN
- 1475-7508 (ISSN-L)
- 1475-7516
- OpenAlex
- W2088160220
- Cited by
- 544
- References
- 1
- FWCI
- 8.59
- Type
- journal article
- Language
- en
- Open access
- green
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- Kim, J. E., Nilles, H. P., & Peloso, M. (2005). Completing natural inflation. Journal of Cosmology and Astroparticle Physics. https://doi.org/10.1088/1475-7516/2005/01/005
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
