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Probing CPT violation with CMB polarization measurements
Xia, JQ; Li H(李虹); Zhang XM(张新民); Li, H; Zhang, XM
2010
发表期刊PHYSICS LETTERS B
卷号687期号:2-3页码:#REF!
通讯作者Xia, JQ (reprint author), Scuola Int Super Studi Avanzati, Via Beirut 2-4, I-34014 Trieste, Italy.
文章类型Article
摘要The electrodynamics modified by the Chern-Simons term Lcs similar to p(mu)A(nu)(F) over tilde (mu nu) with a non-vanishing p(mu) violates the Charge-Parity-Time Reversal symmetry (CPT) and rotates the linear polarizations of the propagating Cosmic Microwave Background (CMB) photons. In this Letter we measure the rotation angle Delta alpha by performing a global analysis on the current CMB polarization measurements from the five-year Wilkinson Microwave Anisotropy Probe (WMAP5), BOOMERanG 2003 (B03), BICEP and QUaD using a Markov Chain Monte Carlo method. Neglecting the systematic errors of these experiments, we find that the results from WMAP5, B03 and BICEP all are consistent and their combination gives Delta alpha = -2.62 +/- 0.87 deg (68% C.L.), indicating a 3 sigma detection of the CPT violation. The QUaD data alone gives Delta alpha = 0.59 +/- 0.42 deg (68% C.L.) which has an opposite sign for the central value and smaller error bar compared to that obtained from WMAP5, B03 and BICEP. When combining all the polarization data together, we find Delta alpha = 0.09 +/- 0.36 deg (68% C.L.) which significantly improves the previous constraint on Delta alpha and test the validity of the fundamental CPT symmetry at a higher level. (C) 2010 Elsevier B.V. All rights reserved.
关键词Observational cosmology Lorentz and Poincare invariance Charge conjugation, parity, time reversal, and other discrete symmetries
学科领域Physics
DOI10.1016/j.physletb.2010.03.038
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000277070800007
引用统计
被引频次:35[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226371
专题理论物理室
粒子天体物理中心
推荐引用方式
GB/T 7714
Xia, JQ,Li H,Zhang XM,et al. Probing CPT violation with CMB polarization measurements[J]. PHYSICS LETTERS B,2010,687(2-3):#REF!.
APA Xia, JQ,李虹,张新民,Li, H,&Zhang, XM.(2010).Probing CPT violation with CMB polarization measurements.PHYSICS LETTERS B,687(2-3),#REF!.
MLA Xia, JQ,et al."Probing CPT violation with CMB polarization measurements".PHYSICS LETTERS B 687.2-3(2010):#REF!.
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