The effects on CMB power spectra and bispectra from the polarization rotation and its correlations with temperature and E-polarization

被引：12

作者：

Zhai, Hua ^{[1
,2
]}

Li, Si-Yu ^{[3
]}

Li, Mingzhe ^{[4
,5
]}

Li, Hong ^{[3
]}

Zhang, Xinmin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys IHEP, Theoret Phys Div, 19B Yuquan Rd, Beijing 100049, Peoples R China

[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys IHEP, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China

[4] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Study, 96 JinZhai Rd, Hefei 230026, Anhui, Peoples R China

[5] Univ Sci & Technol China, Peng Huanwu Ctr Fundamental Theory, 96 JinZhai Rd, Hefei 230026, Anhui, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2020年 / 12期

关键词：

axions; CMBR polarisation; particle physics - cosmology connection; CMBR theory; CPT-VIOLATION; ANISOTROPIES;

D O I：

10.1088/1475-7516/2020/12/051

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Chern-Simons term, through which the cosmic Axion-like field couples to the electromagnetic field, has the effect to rotate CMB polarization directions and to break the CPT symmetry. This rotation will change the CMB power spectra, no matter isotropic or anisotropic the rotation angle is. In this paper we revisit this issue by further considering the correlations between the anisotropic rotation angle alpha and the CMB temperature and CMB E polarization fields. These correlations could be generated in the Axion-like models with nonzero potential under the adiabatic initial condition. We first investigate how these correlations contribute further modifications to the CMB power spectra, then calculate the CMB bispectra for the temperature and rotated polarization fields. These bispectra would vanish if the T alpha and E alpha correlations are absent. So, they are useful in searching for CPT violation and the T alpha and E alpha correlations arisen in the Axion-like models.

引用

页数：34

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