Low-ℓ CMB power loss in string inflation

32Citations
Citations of this article
7Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

A lack of power on large scales (ℓI∼ 40) might have been observed by the PLANCK satellite. We argue that this putative feature can be explained by a phase of fast roll at the onset of inflation. We show that in the context of single field models what is required is an asymmetric inflection point model of which fibre inflation is a string motivated example. We study the ability of fibre inflation to generate a suppression of the CMB 2-point function power at low ℓ, finding that the potential derived from string loops is not steep enough for this purpose. We introduce a steeper contribution to the potential, that dominates away from the inflationary region, and show that if properly tuned it can indeed lead to a spectrum with lack of power at large scales. © 2014 The Author(s).

Author supplied keywords

Cite

CITATION STYLE

APA

Pedro, F. G., & Westphal, A. (2014). Low-ℓ CMB power loss in string inflation. Journal of High Energy Physics, 2014(4). https://doi.org/10.1007/JHEP04(2014)034

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free