Dark Ultra-Light Scalars and Cosmic Parity Violation
Cosmology and Nongalactic Astrophysics
2020-01-01 v1
Abstract
If the dark sector of the Universe consists of ultra-light scalars, their coupling to photon via a Chern-Simons term would induce a rotation of the polarization plane of the cosmic microwave background (CMB). This rotation would convert E -mode polarization into B -mode polarization, resulting in new CMB BB correlation and parity-violating TB and EB cross correlations. We review the subject giving details about the derivation of the rotational effects and summarizing the possible signals in current and future CMB B-mode experiments.
Keywords
Cite
@article{arxiv.1912.12903,
title = {Dark Ultra-Light Scalars and Cosmic Parity Violation},
author = {Seokcheon Lee and Guo-Chin Liu and Kin-Wang Ng},
journal= {arXiv preprint arXiv:1912.12903},
year = {2020}
}
Comments
24 pages, 7 figures