“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 16174
School of Particles and Accelerator
  Title:   The generation of B-mode and circular polarization of cosmic photons due to Non-Commutative space-Time background
  Author(s): 
1.  Seddigheh Tizchang
2.  Saghar Batebi
3.  Mansour Haghighat
4.  Rohoollah Mohammadi
  Status:   In Proceedings
  Proceeding: In Proceeding of PoS ICHEP2018
  Vol.:  142
  Year:  2019
  Supported by:  IPM
  Abstract:
In the standard model of cosmology, the B-mode polarization of the cosmic microwave background can be generated due to the tensor perturbation of metric which is related to gravitational effects in the inflation epoch and scalar perturbation cannot explain B-mode polarization. We consider Compton scattering in the Non-Commutative framework and show that Compton scattering in presence of Non-Commutative background and scalar mode of perturbation, besides generating circularly polarized microwave, can lead to B-mode polarization of the Cosmic Microwave Background. We estimate that generated V-mode C_VlC Vl ​ can be expressed as linearly polarized power spectrum C_PlC Pl ​ as well as B-mode power spectrum C_BlC Bl ​ as a function of C_VlC Vl ​ . We show that C_VlC Vl ​ (C_BlC Bl ​ ) for NC-scale _NC 20Λ NC ​ ∼20 TeV are in the range of (nK^2)O(nK 2 ) ((pK^2)O(pK 2 )) and higher, respectively, which are in the range of observational data.

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