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“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 15937
School of Particles and Accelerator
  Title:   B-mode Power Spectrum of CMB via Polarized Compton Scattering
  Author(s): 
1 . Jafar Khodagholizadeh
2 . Rohoollah Mohammadi
3 . Mahdi Sadegh
4 . Ali Vahedi
  Status:   Published
  Journal: JCAP
  No.:  051
  Vol.:  01
  Year:  2020
  Supported by:  IPM
  Abstract:
In this work, according to some evidence from being an asymmetry in the number density of left and right-handed electrons, δL, in-universe motivate us to calculate the dominated contribution of this asymmetry in the generation of B-mode power spectrum C B l(S). Note, in the standard cosmological scenario, Compton scattering in the presence of scalar matter perturbation can not generate magnetic like pattern in linear polarization while in the case of polarized Compton scattering, we have shown CB l(S) ∝ δL2. We add up the spectrum of the B-mode generated by the polarized Compton scattering to the spectra produced by weak lensing effects and Compton scattering in the presence of tensor perturbations. The results show a significant amplification in CB l in large scale l < 500 for δL > 10−6 which will be observable in future high resolution B-mode polarization detection. Finally, we have shown that C B l(S) generated by polarized Compton scattering can suppress the tensor to scalar ratio, r parameter so that this contamination can be comparable to a primordial tensor-to-scalar ratio spatially for δL > 10−5.

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