Imprint of multicomponent dark matter on AMS-02

doi:10.1103/PhysRevD.89.055021

ITP OpenIR > 理论物理所2014年知识产出

	Imprint of multicomponent dark matter on AMS-02
	Geng, CQ; Huang, D; Tsai, LH; Geng, CQ (reprint author), Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan.
	2014
发表期刊	PHYSICAL REVIEW D
ISSN	1550-7998
卷号	89 期号:5 页码:55021
摘要	The multicomponent decaying dark matter (DM) scenario is investigated to explain the possible excesses in the positron fraction by PAMELA and recently confirmed by AMS-02, and in the total e(+) + e(-) flux observed by Fermi-LAT. By performing the chi(2) fits, we find that two DM components are already enough to give a reasonable fit of both AMS-02 and Fermi-LAT data. The best-fitted results show that the heavier DM component with its mass of 1.5 TeV dominantly decays through the mu channel, while the lighter one of 100 GeV decays mainly through the tau channel. As a by-product, the fine structure around 100 GeV observed by AMS-02 and Fermi-LAT can be naturally explained by the dropping due to the lighter DM component. With the obtained model parameters by the fitting, we calculate the diffuse gamma-ray emission spectrum in this two-component DM scenario, and find that it is consistent with the data measured by Fermi-LAT. We also construct a microscopic particle DM model to naturally realize the two-component DM scenario, and point out an interesting neutrino signal which will possibly be measured in the near future by IceCube.
部门归属	[Geng, Chao-Qiang
关键词	Cosmic-ray Electrons Gamma-ray Positron Fraction Pamela Excess Propagation Energies Models Bounds Mass
学科领域	Physics
资助者	National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1] ; National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1] ; National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1] ; National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1]
DOI	10.1103/PhysRevD.89.055021
URL	查看原文
收录类别	SCI
语种	英语
资助者	National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1] ; National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1] ; National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1] ; National Center for Theoretical Science; National Science Council [NSC-101-2112-M-007-006-MY3]; National Tsing Hua University [102N1087E1, 102N2725E1]
WOS记录号	WOS:000334305300006
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/15803
专题	理论物理所2014年知识产出
通讯作者	Geng, CQ (reprint author), Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan.
推荐引用方式 GB/T 7714	Geng, CQ,Huang, D,Tsai, LH,et al. Imprint of multicomponent dark matter on AMS-02[J]. PHYSICAL REVIEW D,2014,89(5):55021.
APA	Geng, CQ,Huang, D,Tsai, LH,&Geng, CQ .(2014).Imprint of multicomponent dark matter on AMS-02.PHYSICAL REVIEW D,89(5),55021.
MLA	Geng, CQ,et al."Imprint of multicomponent dark matter on AMS-02".PHYSICAL REVIEW D 89.5(2014):55021.

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