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arXiv 1111.3216astro-ph.HEastro-ph.GA
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电子正电子湮没线与衰变的不育中微子

Electron-positron Annihilation Lines and Decaying Sterile Neutrinos

M. H. Chan, M. -C. Chu

摘要:

如果存在大量的惰性中微子,它们衰变为光子和/或电子-正电子对可能会引起可观察到的后果。我们考虑了MeV无菌中微子衰变导致银河系中心弥散正电子湮没线的可能性,并由此从相关的天体物理/宇宙学数据中得到了无菌中微子衰变率$Γ_e \ge 10^{-28}$ s $^{-1}$的界.此外,我们预计软伽马流量$1.2 \times 10^{-4}-9.7 \times 10^{-4}$ ph cm $^{-2}$ s $^{-1}$从银河系中心,显示为一个小MeV的颠簸在背景光子谱。此外,我们还估计了无菌中微子衰变产生的活动中微子穿过地球的通量为$0.02-0.1$ cm $^{-2}$ s $^{-1}$。

英文摘要:

If massive sterile neutrinos exist, their decays into photons and/or electron-positron pairs may give rise to observable consequences. We consider the possibility that MeV sterile neutrino decays lead to the diffuse positron annihilation line in the Milky Way center, and we thus obtain bounds on the sterile neutrino decay rate $Γ_e \ge 10^{-28}$ s$^{-1}$ from relevant astrophysical/cosmological data. Also, we expect a soft gamma flux of $1.2 \times 10^{-4}-9.7 \times 10^{-4}$ ph cm$^{-2}$ s$^{-1}$ from the Milky Way center which shows up as a small MeV bump in the background photon spectrum. Furthermore, we estimate the flux of active neutrinos produced by sterile neutrino decays to be $0.02-0.1$ cm$^{-2}$ s$^{-1}$ passing through the earth.

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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