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题名: Primordial power spectrum versus extension parameters beyond the standard model
作者: Guo, ZK ;  Zhang, YZ
刊名: PHYSICAL REVIEW D
出版日期: 2012
卷号: 85, 期号:10, 页码:103519
关键词: OBSERVATIONS COSMOLOGICAL INTERPRETATION ;  WMAP DATA ;  ANISOTROPY ;  TELESCOPE ;  RECONSTRUCTION ;  OSCILLATIONS ;  INFLATION ;  UNIVERSE
学科分类: Physics
通讯作者: Guo, ZK (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
部门归属: [Guo, Zong-Kuan; Zhang, Yuan-Zhong] Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: We reconstruct the shape of the primordial power spectrum of curvature perturbations in extended cosmological models, including addition of massive neutrinos, extra relativistic species, or varying primordial helium abundance, from the latest cosmic microwave background data from the Wilkinson Microwave Anisotropy Probe, the Atacama Cosmology Telescope, and the South Pole Telescope. We find that a scale-invariant primordial spectrum is disfavored by the data at 95% confidence level even in the presence of massive neutrinos, however it can lie within the 95% confidence region if the effective number of relativistic species or the primordial helium abundance is allowed to vary freely. The constraints on the extension parameters from WMAP7 + ACT + H-0 + BAO are the total mass of neutrinos Sigma m(p) < 0.48 eV (95% C.L.), the effective number of relativistic species N-eff 4.50 +/- 0.81, and the primordial helium abundance Y-p 0.303 +/- 0.075. The constraints from WMAP7 + SPT + H-0 + BAO are Sigma m(p) < 0.45 eV (95% C.L.), N-eff 3.86 +/- 0.63, and Y-p 0.277 +/- 0.050.
资助者: Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000304175000001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15100
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Guo, ZK,Zhang, YZ. Primordial power spectrum versus extension parameters beyond the standard model[J]. PHYSICAL REVIEW D,2012,85(10):103519.
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