Probing CPT violation with CMB polarization measurements
文献类型：期刊论文
| 作者 | Xia, JQ; Li H(李虹) ; Zhang XM(张新民); Li, H; Zhang, XM
|
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2010 |
| 卷号 | 687期号:2-3页码:#REF! |
| 关键词 | Observational cosmology Lorentz and Poincare invariance Charge conjugation parity time reversal and other discrete symmetries |
| 通讯作者 | Xia, JQ (reprint author), Scuola Int Super Studi Avanzati, Via Beirut 2-4, I-34014 Trieste, Italy. |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| WOS记录号 | WOS:000277070800007 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/226371]  |
| 专题 | 高能物理研究所_理论物理室 |
| 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!. |
入库方式： OAI收割
来源：高能物理研究所
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