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arXiv 1207.6773hep-phastro-ph.CO
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用未来的观测站研究来自暗物质的Gamma-Ray谱线

Investigating Gamma-Ray Lines from Dark Matter with Future Observatories

Lars Bergström, Gianfranco Bertone, Jan Conrad, Christian Farnier, Christoph Weniger

摘要:

我们研究了即将到来的伽马射线实验,如HESS-II,切伦科夫望远镜阵列(CTA),和伽马-400卫星的伽马射线光谱研究线功能的前景。作为一个例子,我们使用在费米-LAT卫星的公共数据中看到的130 GeV的窄特征。我们发现,所有三个实验应该能够自信地确认或排除这个130 GeV功能的存在。如果它是真实的,它应该以高于5 sigma的置信水平进行确认。假设它是暗物质来源的光谱特征,由于在100 GeV下的投影能量分辨率约为1.5%,如果相应的分支比与两个光子的分支比相当,那么伽马-400也应该能够分辨出γγ线和相应的Zγ或Hγ特征。它也将允许区分伽马射线线和内部韧致辐射光子产生的类似特征。

英文摘要:

We study the prospects for studying line features in gamma-ray spectra with upcoming gamma-ray experiments, such as HESS-II, the Cherenkov Telescope Array (CTA), and the GAMMA-400 satellite. As an example we use the narrow feature at 130 GeV seen in public data from the Fermi-LAT satellite. We found that all three experiments should be able to confidently confirm or rule out the presence of this 130 GeV feature. If it is real, it should be confirmed with a confidence level higher than 5 sigma. Assuming it to be a spectral signature of dark matter origin, GAMMA-400, thanks to a projected energy resolution of about 1.5% at 100 GeV, should also be able to resolve both the γγ-line and a corresponding Zγ- or Hγ-feature, if the corresponding branching ratio is comparable to that into two photons. It will also allow to distinguish between a gamma-ray line and the similar feature resulting from internal bremsstrahlung photons.

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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