Constraints on models with a break in the primordial power spectrum

	Constraints on models with a break in the primordial power spectrum
	Li H(李虹); Li, H; Xia, JQ; Brandenberger, R; Zhang, XM; Zhang XM(张新民)
刊名	PHYSICS LETTERS B
	2010
卷号	690 期号:5 页码:451-455
关键词	Bounce cosmology Astronomical observational data
通讯作者	[Li, Hong ; Brandenberger, Robert ; Zhang, Xinmin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Li, Hong ; Brandenberger, Robert ; Zhang, Xinmin] Chinese Acad Sci, TPCSF, Beijing 100864, Peoples R China ; [Li, Hong ; Brandenberger, Robert] Chinese Acad Sci, Kavli Inst Theoret Phys, Beijing 100190, Peoples R China ; [Xia, Jun-Qing] Scuola Int Super Studi Avanzati, I-34136 Trieste, Italy ; [Brandenberger, Robert] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
英文摘要	One of the characteristics of the "Matter Bounce" scenario, an alternative to cosmological inflation for producing a scale-invariant spectrum of primordial adiabatic fluctuations on large scales, is a break in the power spectrum at a characteristic scale, below which the spectral index changes from n(s) = 1 to n(s) = 3. We study the constraints which current cosmological data place on the location of such a break, and more generally on the position of the break and the slope at length scales smaller than the break. The observational data we use include the WMAP five-year data set (WMAP5), other CMB data from BOOMERanG, CBI, VSA, and ACBAR, large-scale structure data from the Sloan Digital Sky Survey (SDSS, their luminous red galaxies sample), Type la Supernovae data (the "Union" compilation), and the Sloan Digital Sky Survey Lyman-alpha forest power spectrum (Ly alpha) data. We employ the Markov Chain Monte Carlo method to constrain the features in the primordial power spectrum which are motivated by the matter bounce model. We give an upper limit on the length scale where the break in the spectrum occurs. (C) 2010 Elsevier B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000279989100002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/237538]
专题	高能物理研究所_理论物理室高能物理研究所_粒子天体物理中心高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li H,Li, H,Xia, JQ,et al. Constraints on models with a break in the primordial power spectrum[J]. PHYSICS LETTERS B,2010,690(5):451-455.
APA	李虹,Li, H,Xia, JQ,Brandenberger, R,Zhang, XM,&张新民.(2010).Constraints on models with a break in the primordial power spectrum.PHYSICS LETTERS B,690(5),451-455.
MLA	李虹,et al."Constraints on models with a break in the primordial power spectrum".PHYSICS LETTERS B 690.5(2010):451-455.