CMB anomalies from an inflationary model in string theory
Cosmology and Nongalactic Astrophysics
2014-08-11 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
Recent Planck measurements show some CMB anomalies on large angular scales, which confirms the early observations by WMAP. We show that an inflationary model, in which before the slow-roll inflation the Universe is in a superinflationary phase, can generate a large-scale cutoff in the primordial power spectrum, which may account for not only the power suppression on large angular scales, but also a large dipole power asymmetry in the CMB. We discuss an implementation of our model in string theory.
Cite
@article{arxiv.1311.1599,
title = {CMB anomalies from an inflationary model in string theory},
author = {Zhi-Guo Liu and Zong-Kuan Guo and Yun-Song Piao},
journal= {arXiv preprint arXiv:1311.1599},
year = {2014}
}
Comments
6 pages, 4 figures, some refs. added and minor change