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arXiv 1608.04056hep-phastro-ph.HE
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可能的42.7 GeV $γ$射线线的解释

Interpretations of the possible 42.7 GeV $γ$-ray line

Lei Feng, Yun-Feng Liang, Tie-Kuang Dong, Yi-Zhong Fan

摘要:

最近,Liang等人在附近16个星系团的方向上发现了一个能量约为43 GeV的试探性线信号。如果是由暗物质湮灭引起的,则暗物质粒子的质量应为$m_χ\sim 43$ GeV,需要湮灭截面$\langle σv \rangle \sim 5\times10^{-28}(\overline{\rm BF}/10^{3})^{-1}~{\rm cm^3~s^{-1}}$,其中$\overline{\rm BF}$是这些星系团湮灭信号的平均增强因子。在这项工作中,我们讨论了几个模型,可以解释这些功能和估计模型参数。通常需要相当大的耦合参数。给出了暗物质湮灭为$b\bar{b}$、$μ^+μ^-$等各种末态截面的$2σ$上限值。

英文摘要:

Recently Liang et al. found a tentative line signal at about 43 GeV in the directions of sixteen nearby Galaxy Clusters. If arising from dark matter annihilation, the mass of the dark matter particles should be $m_χ\sim 43$ GeV and the annihilation cross section $\langle σv \rangle \sim 5\times10^{-28}(\overline{\rm BF}/10^{3})^{-1}~{\rm cm^3~s^{-1}}$ is needed, where $\overline{\rm BF}$ 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 sizeable coupling parameter is needed. The $2σ$ upper limits on the cross section of the dark matter annihilation into various final states such as $b\bar{b}$, $μ^+μ^-$ and so on are also presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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