Chaotic Inflation RIDES Again
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866917117259939840 |
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| author | Keus, Venus King, Stephen F. |
| author_facet | Keus, Venus King, Stephen F. |
| contents | Following the recent Atacama Cosmology Telescope (ACT) results, we revisit chaotic inflation based on a single complex scalar field with mass term $M^2 |Φ|^2$, which usually predicts a spectra index $n_s\approx 0.96$ but a too-large tensor to scalar ratio $r\approx 0.16$. With radiative corrections, the potential $M^2 |Φ|^2 \ln \left( |Φ|^2/Λ^2 \right)$ induces spontaneous symmetry breaking near the scale $Λ$, yielding a Pseudo Nambu-Goldstone boson which can play the role of a quintessence field, hence radiative inflation and dark energy (RIDE). Including a non-minimal coupling to gravity
$ξ|Φ|^2 R^2$ reduces $r$, allowing a good fit of the RIDE model to Planck data. Allowing a small additional quartic coupling correction $λ|Φ|^4$ increases both $n_s$ and $r$, with a good fit to ACT data sets achieved for $ξ\approx 1$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_05799 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chaotic Inflation RIDES Again Keus, Venus King, Stephen F. High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory Following the recent Atacama Cosmology Telescope (ACT) results, we revisit chaotic inflation based on a single complex scalar field with mass term $M^2 |Φ|^2$, which usually predicts a spectra index $n_s\approx 0.96$ but a too-large tensor to scalar ratio $r\approx 0.16$. With radiative corrections, the potential $M^2 |Φ|^2 \ln \left( |Φ|^2/Λ^2 \right)$ induces spontaneous symmetry breaking near the scale $Λ$, yielding a Pseudo Nambu-Goldstone boson which can play the role of a quintessence field, hence radiative inflation and dark energy (RIDE). Including a non-minimal coupling to gravity $ξ|Φ|^2 R^2$ reduces $r$, allowing a good fit of the RIDE model to Planck data. Allowing a small additional quartic coupling correction $λ|Φ|^4$ increases both $n_s$ and $r$, with a good fit to ACT data sets achieved for $ξ\approx 1$. |
| title | Chaotic Inflation RIDES Again |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2511.05799 |