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Leptophilic dark matter in Galactic Center excess
Lu, Bo-Qiang1,2; Zong, Hong-Shi1
Source PublicationPHYSICAL REVIEW D
AbstractHerein 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 HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000373583600002
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
GB/T 7714
Lu, Bo-Qiang,Zong, Hong-Shi. Leptophilic dark matter in Galactic Center excess[J]. PHYSICAL REVIEW D,2016,93(8).
APA Lu, Bo-Qiang,&Zong, Hong-Shi.(2016).Leptophilic dark matter in Galactic Center excess.PHYSICAL REVIEW D,93(8).
MLA Lu, Bo-Qiang,et al."Leptophilic dark matter in Galactic Center excess".PHYSICAL REVIEW D 93.8(2016).
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