Higher derivative D-term inflation in new-minimal supergravity

Investor logo

Warning

This publication doesn't include Faculty of Medicine. It includes Faculty of Science. Official publication website can be found on muni.cz.
Authors

FARAKOS Fotis DALIANIS Iannis

Year of publication 2014
Type Article in Periodical
Magazine / Source PHYSICS LETTERS B
MU Faculty or unit

Faculty of Science

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.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info