标题： FeXXVI Ly gamma线在银河系中心的过量现象能否为17 keV惰性中微子提供证据？ 显示英文标题

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

摘要： 粒子物理的标准模型假设中微子是无质量的，尽管实验上确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（或右旋中微子）是一个良好的温暗物质候选者。 我们发现，由Suzaku X射线任务在银河系中心光谱中观测到的8.7 keV线（在FeXXVI Ly$\gamma$线的能量处）的强度过剩无法通过标准的电离和复合过程来解释。 我们建议，这种过剩的来源是质量为17.4 keV的惰性中微子衰变，并估算了混合角的值。 混合角$\sin^2(2\theta)=(4.1 \pm 2.2)\times10^{-12}$的估计值位于质量为17-18 keV的暗物质惰性中微子的混合角允许区域内。 显示英文摘要

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$\gamma$ 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 $\sin^2(2\theta)=(4.1 \pm 2.2)\times10^{-12}$ lies in the allowed region of the mixing angle of dark matter sterile neutrino with a mass of 17-18 keV.