Higher derivative D-term inflation in new-minimal supergravity
| Autoři | |
|---|---|
| Rok publikování | 2014 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | PHYSICS LETTERS B |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | Link to science direct |
| Doi | http://dx.doi.org/10.1016/j.physletb.2014.07.028 |
| Obor | Elementární částice a fyzika vysokých energií |
| Klíčová slova | N=1 SUPERGRAVITY; COUPLINGS; MATTER |
| Popis | 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 eta-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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