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arXiv 0711.3528astro-phhep-ph
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来自MeV毫荷电暗物质的银河系511 keV谱线

Galactic 511 keV line from MeV millicharged dark matter

Ji-Haeng Huh, Jihn E. Kim, Jong-Chul Park, Seong Chan Park

摘要:

我们提出了一个可能的解释,最近观察到的511 keV的$γ$射线异常与一个新的“毫荷电”费米子。新的费米子是轻的(${\cal O}({\rm MeV})$),但从来没有被任何对撞机实验观察到,主要是因为它的微小电磁电荷$εe$。我们表明,在宇宙和对撞机实验的遗迹密度的限制允许一个参数范围,使511千电子伏的宇宙$γ$ -射线发射从银河系隆起可能是由于正电子生产从这个millicharged费米子。

英文摘要:

We present a possible explanation of the recently observed 511 keV $γ$-ray anomaly with a new ``millicharged'' fermion. The new fermion is light (${\cal O}({\rm MeV})$) but has never been observed by any collider experiments mainly because of its tiny electromagnetic charge $εe$. We show that constraints from its relic density in the Universe and collider experiments allow a parameter range such that the 511 keV cosmic $γ$-ray emission from the galactic bulge may be due to positron production from this millicharged fermion.

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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