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题名: Interpretations of the possible 42.7 GeV gamma-ray line
作者: Feng, Lei; Liang, Yun-Feng; Dong, Tie-Kuang; Fan, Yi-Zhong
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 94, 期号:4, 页码:64
DOI: 10.1103/PhysRevD.94.043535
英文摘要: Recently Liang et al. [Phys. Rev. D93, 103525 (2016)] found a tentative line signal at about 43 GeVin the directions of 16 nearby galaxy clusters. If arising from dark matter annihilation, the mass of the dark matter particles should be m(chi) similar to 43 GeV and the annihilation cross section similar to 5 x 10(-28) ((BF) over bar= 10(3))(-1) cm(3) s(-1) is needed, where (BF) over bar is the averaged boost factor of the annihilation signal of these galaxy clusters. In this work we discuss several models which could interpret these features and estimate the model parameters. Usually a sizeable coupling parameter is needed. The 2 sigma upper limits on the cross section of the dark matter annihilation into various final states such as b (b) over bar, mu(+)mu(-) and so on are also presented.
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16812
Appears in Collections:暗物质和空间天文实验室_期刊论文

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