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arXiv 1601.05089hep-ph
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费米gamma-ray过剩驱动的暗物质

Secluded singlet fermionic dark matter driven by the Fermi gamma-ray excess

Yeong Gyun Kim, Kang Young Lee, Chan Beom Park, Seodong Shin

摘要:

我们研究的可能性,暗物质(DM)的解释的GeV规模的费米伽马射线过剩在银河系中心可以实现在一个特定的框架-孤立的单态费米暗物质模型与小混合之间的黑暗和标准模型部门。在这个框架内,它表明,DM湮灭到底夸克对,希格斯对,和新的标量对可以得到很好的拟合费米伽玛射线数据。此外,还考虑了PAMELA和AMS-02的反质子比、Fermi-LAT的矮球状星系γ射线辐射和LHC的Higgs测量的不可避免的约束。然后,我们发现我们的最佳拟合参数的费米伽马射线过剩,而不冲突的其他实验和宇宙学的限制,如果考虑到银河系DM密度分布的不确定性。成功幸存的参数是未来研究对撞机信号的基准点。

英文摘要:

We examine the possibility that the dark matter (DM) interpretation of the GeV scale Fermi gamma-ray excess at the Galactic Center can be realized in a specific framework - secluded singlet fermionic dark matter model with small mixing between the dark and Standard Model sector. Within this framework it is shown that the DM annihilation into bottom-quark pair, Higgs pair, and new scalar pair can give good fits to the Fermi gamma-ray data. Moreover unavoidable constraints from the antiproton ratio by the PAMELA and AMS-02, the gamma-ray emission from the dwarf spheroidal galaxies by the Fermi-LAT, and the Higgs measurements by the LHC are also considered. Then we found our best-fit parameters for the Fermi gamma-ray excess without conflicting other experimental and cosmological constraints if uncertainties on the DM density profile of the Milky Way Galaxy are taken into account. Successfully surviving parameters are benchmark points for future study on the collider signals.

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