Is Imaginary Starobinsky Model Real?
High Energy Physics - Theory
2015-06-19 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We investigate the recently proposed possibility of chaotic inflation with respect to the imaginary part of the field T in a supersymmetric embedding of the Starobinsky model. We show that the stage of rapid expansion driven by Im T in this model ends almost instantly, and the subsequent stages of inflation are driven by the real part of the field T, as in the standard Starobinsky model. Thus, the Starobinsky model and its supersymmetric generalizations remain disfavored by the recent BICEP2 data.
Keywords
Cite
@article{arxiv.1403.7189,
title = {Is Imaginary Starobinsky Model Real?},
author = {Renata Kallosh and Andrei Linde and Bert Vercnocke and Wissam Chemissany},
journal= {arXiv preprint arXiv:1403.7189},
year = {2015}
}
Comments
10 pages, 6 figures, minor corrections