Neutrino signals from ultracompact minihalos and constraints on the primordial curvature perturbation

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	Neutrino signals from ultracompact minihalos and constraints on the primordial curvature perturbation
	Yang, YP ; Yang, GL ; Zong, HS
刊名	PHYSICAL REVIEW D
	2013
卷号	87 期号:10 页码:103525
关键词	DARK-MATTER POWER SPECTRUM PROBE UNIVERSE TELESCOPE ABUNDANCE
ISSN号	1550-7998
通讯作者	Yang, YP (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
英文摘要	Compared with that of standard dark matter halos, the density profile of the recently proposed new kind of dark matter structure named ultracompact minihalos (UCMHs) is steeper and its formation time is earlier. If the dark matter is composed of weakly interactive massive particles, the potential signals, e. g., neutrinos, from UCMHs due to dark matter annihilation would be detected by IceCube/DeepCore or other detectors and such signals would have a very useful complementarity of gamma-ray observations. On the other hand, the formation of UCMHs is related to primordial curvature perturbations on the smaller scales. So constraints on the abundance of UCMHs can be used to give a limit on the perturbations on these scales. In previous works in the literature, the authors focused on the gamma-ray signals from UCMHs due to dark matter annihilation. In this work, we investigate the neutrino signals from nearby UCMHs. Although no excess of neutrino signals from dark matter annihilation has been observed, the constraints on the abundance of UCMHs can be obtained and these constraints can be translated into the limit on the primordial curvature perturbations on small scales.
学科主题	Physics
收录类别	SCI
资助信息	National Natural Science Foundation of China [10935001, 11275097, 11075075]; Research Fund for the Doctoral Program of Higher Education [2012009111002]
原文出处	http://dx.doi.org/10.1103/PhysRevD.87.103525
语种	英语
WOS记录号	WOS:000319656400006
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15358]
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	Yang, YP,Yang, GL,Zong, HS. Neutrino signals from ultracompact minihalos and constraints on the primordial curvature perturbation[J]. PHYSICAL REVIEW D,2013,87(10):103525.
APA	Yang, YP,Yang, GL,&Zong, HS.(2013).Neutrino signals from ultracompact minihalos and constraints on the primordial curvature perturbation.PHYSICAL REVIEW D,87(10),103525.
MLA	Yang, YP,et al."Neutrino signals from ultracompact minihalos and constraints on the primordial curvature perturbation".PHYSICAL REVIEW D 87.10(2013):103525.