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arXiv 1210.3013astro-ph.HEhep-ph
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在费米LAT上观测到一条gamma-ray线

Tentative observation of a gamma-ray line at the Fermi LAT

Christoph Weniger

摘要:

使用费米大天区望远镜43个月的公共伽马射线数据,我们发现在接近银河系中心的区域,能量为130 GeV,超过4.6 sigma,这与暗物质湮灭的伽马射线线并不矛盾。当考虑到别处效应时,观察到的签名的显著性为3.2西格玛。如果按照暗物质粒子湮灭为光子对的观点来解释,观测结果表明部分湮灭截面约为10^-27 cm ^3 s ^-1,暗物质质量约为130 GeV。我们回顾了统计分析的各个方面,并对可能的工具适应症进行了评论。

英文摘要:

Using 43 months of public gamma-ray data from the Fermi Large Area Telescope, we find in regions close to the Galactic center at energies of 130 GeV a 4.6 sigma excess that is not inconsistent with a gamma-ray line from dark matter annihilation. When taking into account the look-elsewhere effect, the significance of the observed signature is 3.2 sigma. If interpreted in terms of dark matter particles annihilating into a photon pair, the observations imply a partial annihilation cross-section of about 10^-27 cm^3s^-1 and a dark matter mass around 130 GeV. We review aspects of the statistical analysis and comment on possible instrumental indications.

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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