https://doi.org/10.1140/epjc/s10052-014-3006-0
Regular Article - Theoretical Physics
CMB anomalies from an inflationary model in string theory
1
School of Physics, University of Chinese Academy of Sciences, Beijing, 100049, China
2
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing , 100190, China
* e-mail: liuzhiguo08@mails.ucas.ac.cn
Received:
18
March
2014
Accepted:
25
July
2014
Published online:
7
August
2014
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.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
