An efficient probe of the cosmological CPT violation

被引：16

作者：

Zhao, Gong-Bo ^{[1
,2
]}

Wang, Yuting ^{[1
,2
]}

Xia, Jun-Qing ^{[3
]}

Li, Mingzhe ^{[4
]}

Zhang, Xinmin ^{[5
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[2] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England

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

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

[5] Chinese Acad Sci, Inst High Energy Phys, Div Theory, Beijing 100049, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 07期

基金：

中国博士后科学基金;

关键词：

CMBR polarisation; gravitational waves and CMBR polarization; GRAVITATIONAL LEPTOGENESIS; LINEAR-REGRESSION; POLARIZATION; SYMMETRY; WMAP; QUINTESSENCE; SIGMA; MASS;

D O I：

10.1088/1475-7516/2015/07/032

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We develop an efficient method based on the linear regression algorithm to probe the cosmological CPT violation using the CMB polarisation data. We validate this method using simulated CMB data and apply it to recent CMB observations. We find that a combined data sample of BICEP1 and BOOMERanG 2003 favours a nonzero isotropic rotation angle at 2.3 sigma confidence level, i.e., (alpha) over tilde = -3.3 degrees +/- 1.4 degrees (68% CL) with systematics included.

引用

页数：13

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