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题名: Leptophilic dark matter in Galactic Center excess
作者: Lu, Bo-Qiang1, 2; Zong, Hong-Shi1
刊名: PHYSICAL REVIEW D
出版日期: 2016-04-06
卷号: 93, 期号:8
DOI: 10.1103/PhysRevD.93.083504
文章类型: Article
英文摘要: Herein we explore the possibility of explaining a gamma-ray excess in the Galactic Center with the dark matter scenario. After taking into account the constraints from both the AMS-02 experiment and the gamma-ray observation on dwarf spheroidal satellite galaxies in Fermi-LAT, we find that the tau lepton channel is the only permissive channel for the interpretation of the Galaxy center excess. Tau leptophilic dark matter provides a well-motivated framework in which the dark matter can dominantly couple to tau lepton at tree-level. We describe the interactions with a general effective field theory approach by using higher-dimensional operators, and this approach provides for a model independent analysis. We consider the constraints from the measurement of the DM relic density in the Planck experiment and the AMS-02 cosmic rays experiment, and find that most of the interaction operators except O-7, O-9 and O-12 have been excluded. Due to the quantum fluctuations, even in such a scenario there are loop induced dark matter-nucleon interactions. We calculate the dark matter-nucleon scattering cross-section at loop-level, and if the limits on the dark matter-nucleon scattering cross-section from direct detection experiments are also taken into account, we find that the operators remaining available for accounting for the Galaxy center excess are O-9 and O-12
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]: Astronomy & Astrophysics ; Physics
关键词[WOS]: COSMIC-RAYS ; SUPERBUBBLE ORIGIN ; NE-22 ; NEON
收录类别: SCI
项目资助者: National Natural Science Foundation of China(11275097 ; 11475085 ; 11535005)
语种: 英语
WOS记录号: WOS:000373583600002
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16182
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
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