An efficient probe of the cosmological CPT violation

Gong-Bo Zhao; Yuting Wang; Jun-Qing Xia; Mingzhe Li; Xinmin Zhang

doi:10.1088/1475-7516/2015/07/032

An efficient probe of the cosmological CPT violation

Gong-Bo Zhao, Yuting Wang, Jun-Qing Xia, Mingzhe Li, Xinmin Zhang

Institute of Cosmology & Gravitation

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Abstract

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 2.3σ confidence level, i.e., bar alpha=−3.3o±1.4o (68% CL) with systematics included.

Original language	English
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2015
Issue number	July
DOIs	https://doi.org/10.1088/1475-7516/2015/07/032
Publication status	Published - 21 Jul 2015

Keywords

astro-ph.CO

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10.1088/1475-7516/2015/07/032

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The final published version of this article is available online athttp://dx.doi.org/10.1088/1475-7516/2015/07/032. © 2015 IOP Publishing Ltd and Sissa Medialab srl

Cite this

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AU - Wang, Yuting

AU - Xia, Jun-Qing

AU - Li, Mingzhe

AU - Zhang, Xinmin

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PY - 2015/7/21

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N2 - 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 2.3σ confidence level, i.e., bar alpha=−3.3o±1.4o (68% CL) with systematics included.

AB - 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 2.3σ confidence level, i.e., bar alpha=−3.3o±1.4o (68% CL) with systematics included.

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DO - 10.1088/1475-7516/2015/07/032

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JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - July

ER -

An efficient probe of the cosmological CPT violation

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Keywords

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