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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1602.00237 (astro-ph)
[Submitted on 31 Jan 2016]

Title:The B-mode polarization of CMB and Cosmic Neutrino Background

Authors:Rohoollah Mohammadi, Jafar Khodagholizadeh, Mahdi Sadegh, She-Sheng Xue
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Abstract:It is known that in contrast with the E-mode polarization, the B-mode polarization of the Cosmic Microwave Background cannot be generated by the Compton scattering in the case of scalar mode of metric perturbation. However it is possible to generate the B-mode by the Compton scattering in the case of tensor mode of metric perturbation. For this reason, the ratio of tensor to scalar modes of metric perturbation ($r\sim C_{Bl}/C_{El}$) is estimated by comparing the B-mode power spectrum with the E-mode at least for small $l$. We study the CMB polarization specially B-mode due to the weak interaction of Cosmic Neutrino Background (CNB) and CMB, in addition to the Compton scattering in both cases of scalar and tensor metric perturbations. It is shown that the power spectrum $C_{Bl}$ of the B-mode polarization receives some contributions from scalar and tensor modes, which have effects on the value of $r$-parameter. We also show that the B-mode polarization power spectrum can be used as an indirect probe into the CNB.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1602.00237 [astro-ph.CO]
  (or arXiv:1602.00237v1 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1602.00237
Journal reference: Phys. Rev. D 93, 125029 (2016)
Related DOI: https://doi.org/10.1103/PhysRevD.93.125029

Submission history

From: Rohoollah Mohammadi [view email]
[v1] Sun, 31 Jan 2016 12:34:59 UTC (94 KB)
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