Superconformal D-Term Inflation
Abstract
We study models of hybrid inflation in the framework of supergravity with superconformal matter. F-term hybrid inflation is not viable since the inflaton acquires a large tachyonic mass. On the contrary, D-term hybrid inflation can successfully account for the amplitude of the primordial power spectrum. It is a two-field inflation model which, depending on parameters, yields values of the scalar spectral index down to n_s ~ 0.96. Generically, there is a tension between a small spectral index and the cosmic string bound albeit, within 2-sigma uncertainty, the current observational bounds can be simultaneously fulfilled.
Cite
@article{arxiv.1210.4105,
title = {Superconformal D-Term Inflation},
author = {W. Buchmüller and V. Domcke and K. Schmitz},
journal= {arXiv preprint arXiv:1210.4105},
year = {2015}
}
Comments
27 pages, 7 figures; v2: discussion in section 2 slightly extended, minor corrections, typos removed, matches published JCAP version