Effects of electrically charged dark matter on cosmic microwave background anisotropies

We examine the possibility that dark matter consists of charged massive particles (CHAMPs) in view of the cosmic microwave background (CMB) anisotropies. The evolution of cosmological perturbations of CHAMPs with other components is followed in a self-consistent manner, without assuming that CHAMPs...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. D 2017-01, Vol.95 (2), Article 023502
Main Authors: Kamada, Ayuki, Kohri, Kazunori, Takahashi, Tomo, Yoshida, Naoki
Format: Article
Language:English
Subjects:
Anisotropy
Big Bang theory
Charged particles
Charging
Cosmic microwave background
Dark matter
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We examine the possibility that dark matter consists of charged massive particles (CHAMPs) in view of the cosmic microwave background (CMB) anisotropies. The evolution of cosmological perturbations of CHAMPs with other components is followed in a self-consistent manner, without assuming that CHAMPs and baryons are tightly coupled. We incorporate for the first time the “kinetic recoupling” of the Coulomb scattering, which is characteristic of heavy CHAMPs. By a direct comparison of the predicted CMB temperature/polarization autocorrelations in CHAMP models and the observed spectra in the Planck mission, we show that CHAMPs leave sizable effects on them if it is lighter than 1011  GeV. Our result can be applicable to any CHAMP as long as its lifetime is much longer than the cosmic time at the recombination (∼4×105  yr). An application to millicharged particles is also discussed.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.95.023502