Primordial power spectrum versus extension parameters beyond the standard model

ITP OpenIR > SCI期刊论文

	Guo, ZK; Zhang, YZ; Guo, ZK (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
	Primordial power spectrum versus extension parameters beyond the standard model
Source Publication	PHYSICAL REVIEW D
Language	英语
Keyword	Observations Cosmological Interpretation Wmap Data Anisotropy Telescope Reconstruction Oscillations Inflation Universe
Abstract	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.
	2012
ISSN	1550-7998
Volume	85 Issue:10 Pages:103519
Subject Area	Physics
Indexed By	SCI
Funding Organization	Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805] ; Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805] ; Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805] ; Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805]
Citation statistics	Cited Times:8[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.itp.ac.cn/handle/311006/15100
Collection	SCI期刊论文
Corresponding Author	Guo, ZK (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Recommended Citation GB/T 7714	Guo, ZK,Zhang, YZ,Guo, ZK . Primordial power spectrum versus extension parameters beyond the standard model[J]. PHYSICAL REVIEW D,2012,85(10):103519.
APA	Guo, ZK,Zhang, YZ,&Guo, ZK .(2012).Primordial power spectrum versus extension parameters beyond the standard model.PHYSICAL REVIEW D,85(10),103519.
MLA	Guo, ZK,et al."Primordial power spectrum versus extension parameters beyond the standard model".PHYSICAL REVIEW D 85.10(2012):103519.

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