Higher derivative D-term inflation in new-minimal supergravity
| Authors | |
|---|---|
| Year of publication | 2014 |
| Type | Article in Periodical |
| Magazine / Source | PHYSICS LETTERS B |
| MU Faculty or unit | |
| Citation | |
| Web | Link to science direct |
| Doi | http://dx.doi.org/10.1016/j.physletb.2014.07.028 |
| Field | Elementary particles and high-energy physics |
| Keywords | N=1 SUPERGRAVITY; COUPLINGS; MATTER |
| Description | 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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