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arXiv · 1403.3053

Higher Derivative D-term Inflation in New-minimal Supergravity

Iannis Dalianis·Fotis Farakos
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Abstract

We revisit the D-term inflation and amend it with ghost-free higher derivative couplings of chiral superfields to super-curvature. These couplings realize a more generic inflationary phase in supergravity. After pointing out that a consistent embedding of these specific higher derivatives is known to exist only in the new-minimal supergravity, we show how a potential for the scalar component may arise due to a Fayet-Iliopoulos D-term. We then turn to inflationary cosmology and explicitly discuss different types of potentials, which capture properties of the common scenarios. These models thanks to the derivative coupling: i) naturally evade the supergravity $η$-problem, ii) drive inflation for a wider range of parameter values, and iii) predict lower values for the tensor-to-scalar ratio.

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Iannis Dalianis, Fotis Farakos. 2014-08-05. Higher Derivative D-term Inflation in New-minimal Supergravity. https://doi.org/10.1016/j.physletb.2014.07.028

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