CMB anomalies from an inflationary model in string theory

The European Physical Journal C

Zhi-Guo Liu¹  Yun-Song Piao¹  Zong-Kuan Guo² 

[1] School of Physics, University of Chinese Academy of Sciences, 100049, Beijing, China;State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, 100190, Beijing , China;

关键词: Hankel Function;    Power Suppression;    Inflationary Model;    Power Asymmetry;    Curvature Perturbation;   

DOI  :  10.1140/epjc/s10052-014-3006-0

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY