TESTING CPT SYMMETRY WITH CURRENT AND FUTURE CMB MEASUREMENTS

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	TESTING CPT SYMMETRY WITH CURRENT AND FUTURE CMB MEASUREMENTS
	Li SY(李思宇); Xia JQ(夏俊卿); Li H(李虹); Zhang XM(张新民); Li, SY; Xia, JQ; Li, MZ; Li, H; Zhang, XM
刊名	ASTROPHYSICAL JOURNAL
	2015
卷号	799 期号:2 页码:211
关键词	cosmic background radiation cosmological parameters cosmology: theory
通讯作者	夏俊卿
英文摘要	In this paper, we use the current and future cosmic microwave background (CMB) experiments to test the Charge-Parity-Time Reversal (CPT) symmetry. We consider a CPT-violating interaction in the photon sector L-cs similar to p(mu)A(upsilon)(F) over tilde (mu upsilon), which gives rise to a rotation of the polarization vectors of the propagating CMB photons. By combining the 9 yr WMAP, BOOMERanG 2003, and BICEP1 observations, we obtain the current constraint on the isotropic rotation angle (alpha) over bar = -2.12 +/- 1.14 (1 sigma), indicating that the significance of the CPT violation is about 2 sigma. Here, we particularly take the systematic errors of CMB measurements into account. Then, we study the effects of the anisotropies of the rotation angle [Delta alpha((n) over cap)] on the CMB polarization power spectra in detail. Due to the small effects, the current CMB polarization data cannot constrain the related parameters very well. We obtain the 95% C.L. upper limit of the variance of the anisotropies of the rotation angle C-alpha(0) < 0.035 from all of the CMB data sets. More interestingly, including the anisotropies of rotation angle could lower the best-fit value of r and relax the tension on the constraints of r between BICEP2 and Planck. Finally, we investigate the capabilities of future Planck polarization measurements on <(alpha)over bar> a and Delta alpha((n) over cap). Benefited from the high precision of Planck data, the constraints of the rotation angle can be significantly improved.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000348820900098
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228120]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Li SY,Xia JQ,Li H,et al. TESTING CPT SYMMETRY WITH CURRENT AND FUTURE CMB MEASUREMENTS[J]. ASTROPHYSICAL JOURNAL,2015,799(2):211.
APA	李思宇.,夏俊卿.,李虹.,张新民.,Li, SY.,...&Zhang, XM.(2015).TESTING CPT SYMMETRY WITH CURRENT AND FUTURE CMB MEASUREMENTS.ASTROPHYSICAL JOURNAL,799(2),211.
MLA	李思宇,et al."TESTING CPT SYMMETRY WITH CURRENT AND FUTURE CMB MEASUREMENTS".ASTROPHYSICAL JOURNAL 799.2(2015):211.