Particle Dark Matter Searches Outside the Local Group

	Particle Dark Matter Searches Outside the Local Group
	Regis, M; Xia JQ(夏俊卿); Xia, JQ; Cuoco, A; Branchini, E; Fornengo, N; Viel, M
刊名	PHYSICAL REVIEW LETTERS
	2015
卷号	114 页码:241301
通讯作者	夏俊卿
英文摘要	If dark matter (DM) is composed by particles which are nongravitationally coupled to ordinary matter, their annihilations or decays in cosmic structures can result in detectable radiation. We show that the most powerful technique to detect a particle DM signal outside the Local Group is to study the angular cross-correlation of nongravitational signals with low-redshift gravitational probes. This method allows us to enhance the signal to noise from the regions of the Universe where the DM-induced emission is preferentially generated. We demonstrate the power of this approach by focusing on GeV-TeV DM and on the recent cross-correlation analysis between the 2MASS galaxy catalogue and the Fermi-LAT gamma-ray maps. We show that this technique is more sensitive than other extragalactic gamma-ray probes, such as the energy spectrum and angular autocorrelation of the extragalactic background, and emission from clusters of galaxies. Intriguingly, we find that the measured cross-correlation can be well fitted by a DM component, with a thermal annihilation cross section and mass between 10 and 100 GeV, depending on the small-scale DM properties and gamma-ray production mechanism. This solicits further data collection and dedicated analyses.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI ; EI
WOS记录号	WOS:000356221000002
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228431]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Regis, M,Xia JQ,Xia, JQ,et al. Particle Dark Matter Searches Outside the Local Group[J]. PHYSICAL REVIEW LETTERS,2015,114:241301.
APA	Regis, M.,夏俊卿.,Xia, JQ.,Cuoco, A.,Branchini, E.,...&Viel, M.(2015).Particle Dark Matter Searches Outside the Local Group.PHYSICAL REVIEW LETTERS,114,241301.
MLA	Regis, M,et al."Particle Dark Matter Searches Outside the Local Group".PHYSICAL REVIEW LETTERS 114(2015):241301.