Primordial power spectrum versus extension parameters beyond the standard model

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	Primordial power spectrum versus extension parameters beyond the standard model
	Guo, ZK
刊名	PHYSICAL REVIEW D
	2012
卷号	85 期号:10 页码:103519
关键词	OBSERVATIONS COSMOLOGICAL INTERPRETATION WMAP DATA ANISOTROPY TELESCOPE RECONSTRUCTION OSCILLATIONS INFLATION UNIVERSE
ISSN号	1550-7998
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.
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.
学科主题	Physics
收录类别	SCI
资助信息	Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805]
原文出处	http://dx.doi.org/10.1103/PhysRevD.85.103519
语种	英语
WOS记录号	WOS:000304175000001
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15100]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Guo, ZK. Primordial power spectrum versus extension parameters beyond the standard model[J]. PHYSICAL REVIEW D,2012,85(10):103519.
APA	Guo, ZK.(2012).Primordial power spectrum versus extension parameters beyond the standard model.PHYSICAL REVIEW D,85(10),103519.
MLA	Guo, ZK."Primordial power spectrum versus extension parameters beyond the standard model".PHYSICAL REVIEW D 85.10(2012):103519.