Deciphering the archaeological record: Cosmological imprints of nonminimal dark sectors

doi:10.1103/PhysRevD.101.123511

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	Deciphering the archaeological record: Cosmological imprints of nonminimal dark sectors
	Dienes, Keith R.; Huang, Fei 4,5; Kost, Jeff 3; Su, Shufang ; Thomas, Brooks 2
刊名	PHYSICAL REVIEW D
	2020
卷号	101 期号:12 页码:123511
关键词	SPECTRAL DISTORTIONS PARAMETER-ESTIMATION MATTER MODELS THERMALIZATION CONSTRAINTS UNIVERSE
ISSN号	1550-7998
DOI	10.1103/PhysRevD.101.123511
英文摘要	Many proposals for physics beyond the Standard Model give rise to a dark sector containing many degrees of freedom. In this work, we exploit the cosmological implications of the nontrivial dynamics which may arise within such dark sectors, focusing on decay processes which take place entirely among the dark constituents. First, we demonstrate that such decays can leave dramatic imprints on the resulting dark-matter phase-space distribution. In particular, this distribution need not be thermal-it can even be multimodal, exhibiting a nontrivial pattern of peaks and troughs as a function of momentum. We then proceed to show how these features can induce modifications to the matter power spectrum. Finally, we assess the extent to which one can approach the archaeological "inverse" problem of deciphering the properties of an underlying dark sector from the matter power spectrum. Indeed, one of the main results of this paper is a remarkably simple conjectured analytic expression which permits the reconstruction of many of the important features of the dark-matter phase-space distribution directly from the matter power spectrum. Our results therefore provide an interesting toolbox of methods for learning about, and potentially constraining, the features of nonminimal dark sectors and their dynamics in the early universe.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27203]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Lafayette Coll, Dept Phys, Easton, PA 18042 USA 2.Inst Basic Sci, Ctr Theoret Phys Universe, Daejeon 34126, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA 5.Dienes, Keith R.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA 6.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Dienes, Keith R.,Huang, Fei,Kost, Jeff,et al. Deciphering the archaeological record: Cosmological imprints of nonminimal dark sectors[J]. PHYSICAL REVIEW D,2020,101(12):123511.
APA	Dienes, Keith R.,Huang, Fei,Kost, Jeff,Su, Shufang,&Thomas, Brooks.(2020).Deciphering the archaeological record: Cosmological imprints of nonminimal dark sectors.PHYSICAL REVIEW D,101(12),123511.
MLA	Dienes, Keith R.,et al."Deciphering the archaeological record: Cosmological imprints of nonminimal dark sectors".PHYSICAL REVIEW D 101.12(2020):123511.