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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1803.08274 (astro-ph)
[Submitted on 22 Mar 2018 (v1), last revised 1 Jun 2018 (this version, v2)]

Title:Superconformal Subcritical Hybrid Inflation

Authors:Koji Ishiwata
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Abstract: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 alpha attractors.
Comments: 6 pages, 3 figures; few typos corrected, published version
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)
Report number: KANAZAWA-18-01
Cite as: arXiv:1803.08274 [astro-ph.CO]
  (or arXiv:1803.08274v2 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1803.08274
Related DOI: https://doi.org/10.1016/j.physletb.2018.05.047

Submission history

From: Koji Ishiwata [view email]
[v1] Thu, 22 Mar 2018 09:20:16 UTC (955 KB)
[v2] Fri, 1 Jun 2018 01:42:38 UTC (955 KB)
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