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arXiv 1001.0215astro-ph.HE
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银河系中心的FeXXVI Ly伽马线中的过剩能为17个keV无菌中微子提供证据吗?

Can the excess in the FeXXVI Ly gamma line from the Galactic Center provide evidence for 17 keV sterile neutrinos?

D. A. Prokhorov, Joseph Silk

摘要:

粒子物理学的标准模型假设中微子是无质量的,尽管实验上建立的中微子振荡现象要求中微子具有非零质量。惰性中微子(或右手中微子)是一个很好的暖暗物质候选者。我们发现,在8.7千电子伏线(在FeXXVI Ly $γ$线的能量)在银河系中心观测到的朱雀X射线任务的光谱的强度过剩不能用标准的电离和复合过程来解释。我们认为,这种过剩的起源是通过与质量为17.4千电子伏的不育中微子的衰变和估计的混合角的值。混合角$\sin^2(2θ)=(4.1 \pm 2.2)\times10^{-12}$的估计值位于质量为17-18 keV的暗物质无菌中微子混合角的允许范围内。

英文摘要:

The standard model of particle physics assumes that neutrinos are massless, although adding non-zeros is required by the experimentally established phenomenon of neutrino oscillations requires neutrinos to have non-zero mass. Sterile neutrinos (or right-handed neutrinos) are a good warm dark matter candidate. We find that the excess of the intensity in the 8.7 keV line (at the energy of the FeXXVI Ly$γ$ line) in the spectrum of the Galactic center observed by the Suzaku X-ray mission cannot be explained by standard ionization and recombination processes. We suggest that the origin of this excess is via decays of sterile neutrinos with a mass of 17.4 keV and estimate the value of the mixing angle. The estimated value of the mixing angle $\sin^2(2θ)=(4.1 \pm 2.2)\times10^{-12}$ lies in the allowed region of the mixing angle of dark matter sterile neutrino with a mass of 17-18 keV.

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