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Geng, CQ; Huang, D; Tsai, LH; Geng, CQ (reprint author), Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan.
Imprint of multicomponent dark matter on AMS-02
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordCosmic-ray Electrons Gamma-ray Positron Fraction Pamela Excess Propagation Energies Models Bounds Mass
AbstractThe 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.
2014
ISSN1550-7998
Volume89Issue:5Pages:55021
Subject AreaPhysics
DOI10.1103/PhysRevD.89.055021
Indexed BySCI
Funding OrganizationNational 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]
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15803
Collection理论物理所科研产出_SCI论文
Corresponding AuthorGeng, CQ (reprint author), Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan.
Recommended Citation
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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