Spectrum of the axion dark sector

doi:10.1103/PhysRevD.96.083510

	Spectrum of the axion dark sector
	Marsh, DJE; Pongkitivanichkul, C; Stott, MJ; Acharya, BS; Price, LC
刊名	PHYSICAL REVIEW D
	2017
卷号	96 期号:8 页码:83510
ISSN号	2470-0010
DOI	10.1103/PhysRevD.96.083510
文献子类	Article
英文摘要	Axions arise in many theoretical extensions of the Standard Model of particle physics, in particular the "string axiverse." If the axion masses, m(a), and (effective) decay constants, f(a), lie in specific ranges, then axions contribute to the cosmological dark matter and dark energy densities. We compute the background cosmological (quasi) observables for models with a large number of axion fields, n(ax) similar to O(10-100), with the masses and decay constants drawn from statistical distributions. This reduces the number of parameters from 2n(ax) to a small number of "hyperparameters." We consider a number of distributions, from those motivated purely by statistical considerations to those where the structure is specified according to a class of M-theory models. Using Bayesian methods, we are able to constrain the hyperparameters of the distributions. In some cases, the hyperparameters can be related to string theory, e.g., constraining the number ratio of axions to moduli, or the typical decay constant scale needed to provide the correct relic densities. Our methodology incorporates the use of both random matrix theory and Bayesian networks.
电子版国际标准刊号	2470-0029
WOS关键词	COSMOLOGICAL PARAMETER-ESTIMATION ; CALABI-YAU ORIENTIFOLDS ; SUPERSYMMETRY BREAKING ; RANEY DISTRIBUTIONS ; LARGEST EIGENVALUE ; INVISIBLE AXION ; MATTER ; WISHART ; CONSTRAINTS ; MATRICES
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000412749000003
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284575]
专题	高能物理研究所_理论物理室
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	Marsh, DJE,Pongkitivanichkul, C,Stott, MJ,et al. Spectrum of the axion dark sector[J]. PHYSICAL REVIEW D,2017,96(8):83510.
APA	Marsh, DJE,Pongkitivanichkul, C,Stott, MJ,Acharya, BS,&Price, LC.(2017).Spectrum of the axion dark sector.PHYSICAL REVIEW D,96(8),83510.
MLA	Marsh, DJE,et al."Spectrum of the axion dark sector".PHYSICAL REVIEW D 96.8(2017):83510.