Single-Superfield Helical-Phase Inflation
Abstract
Large-field inflation in supergravity requires the approximate global symmetry needed to protect flatness of the scalar potential. In helical-phase inflation, the U(1) symmetry of the Kahler potential is assumed, the phase part of the complex scalar of a chiral superfield plays the role of inflaton, and the radial part is strongly stabilized. The original model of helical phase inflation, proposed by Li, Li and Nanopoulos (LLN), employs an extra (stabilizer) superfield. We propose a more economical new class of the helical phase inflationary models without a stabilizer superfield. As the specific examples, the quadratic, the natural, and the Starobinsky-type inflationary models are studied in our approach.
Keywords
Cite
@article{arxiv.1509.00953,
title = {Single-Superfield Helical-Phase Inflation},
author = {Sergei V. Ketov and Takahiro Terada},
journal= {arXiv preprint arXiv:1509.00953},
year = {2015}
}
Comments
11 pages, 3 figures (published version); more explanations and references added, typos corrected, and figures improved