2018/05/28 by S. Mahmoudi, Mahmoudi, S., M. Haghighat +6 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Phenomenology (hep-ph) #astro-ph.CO #astro-ph.HE #hep-ph
paper · pdf · doi:10.48550/arxiv.1805.11172
openalex publication_date 2018/05/28 · arxiv created 2018/10/29 · arxiv updated 2018/10/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider dark matter as singlet fermionic particles which carrying magnetic dipole moment to explore its contribution on the polarization of cosmic microwave background (CMB) photons. We show that Dirac fermionic dark matter has no contribution on the CMB polarization. However, in the case of Majorana dark matter this type of interaction leads to the B-mode polarization in presence of primordial scalar perturbations which is in contrast with standard scenario for the CMB polarization. We numerically calculate the B-mode power spectra and plot ClBB for different dark matter masses and the r-parameter. We show that the dark matter with masses less than 100MeV have valuable contribution on ClBB. Meanwhile, the dark matters with mass md≤50MeV for r=0.07 ( md≤80MeV for r=0.09) can be excluded experimentally. Furthermore, our results put a bound on the magnetic dipole moment about M≤ 10-16 e cm in agreement with the other reported constraints.