Superconformal subcritical hybrid inflation
We consider D-term hybrid inflation in the framework of superconformal supergravity. In part of the parameter space, inflation continues for subcritical inflaton field value. Consequently, a new type of inflation emerges, which gives predictions for the scalar spectral index and the tensor-to-scalar...
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| Format: | Article |
| Language: | English |
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Elsevier
2018-07-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318304118 |
| _version_ | 1818983004111896576 |
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| author | Koji Ishiwata |
| author_facet | Koji Ishiwata |
| author_sort | Koji Ishiwata |
| collection | DOAJ |
| description | We consider D-term hybrid inflation in the framework of superconformal supergravity. In part of the parameter space, inflation continues for subcritical inflaton field value. Consequently, a new type of inflation emerges, which gives predictions for the scalar spectral index and the tensor-to-scalar ratio that are consistent with the Planck 2015 results. The potential in the subcritical regime is found to have a similar structure to one in the simplest class of superconformal α attractors. |
| first_indexed | 2024-12-20T17:56:12Z |
| format | Article |
| id | doaj.art-3dbdf48d77c040eb9813697bb38d1e51 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-20T17:56:12Z |
| publishDate | 2018-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-3dbdf48d77c040eb9813697bb38d1e512022-12-21T19:30:44ZengElsevierPhysics Letters B0370-26932018-07-01782367371Superconformal subcritical hybrid inflationKoji Ishiwata0Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192, JapanWe consider D-term hybrid inflation in the framework of superconformal supergravity. In part of the parameter space, inflation continues for subcritical inflaton field value. Consequently, a new type of inflation emerges, which gives predictions for the scalar spectral index and the tensor-to-scalar ratio that are consistent with the Planck 2015 results. The potential in the subcritical regime is found to have a similar structure to one in the simplest class of superconformal α attractors.http://www.sciencedirect.com/science/article/pii/S0370269318304118 |
| spellingShingle | Koji Ishiwata Superconformal subcritical hybrid inflation Physics Letters B |
| title | Superconformal subcritical hybrid inflation |
| title_full | Superconformal subcritical hybrid inflation |
| title_fullStr | Superconformal subcritical hybrid inflation |
| title_full_unstemmed | Superconformal subcritical hybrid inflation |
| title_short | Superconformal subcritical hybrid inflation |
| title_sort | superconformal subcritical hybrid inflation |
| url | http://www.sciencedirect.com/science/article/pii/S0370269318304118 |
| work_keys_str_mv | AT kojiishiwata superconformalsubcriticalhybridinflation |