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arXiv 0906.3103hep-ph
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可见物质和暗物质的起源与宇宙正电子/电子过剩

Visible and Dark Matter Genesis and Cosmic Positron/Electron Excesses

Pei-Hong Gu, Utpal Sarkar, Xinmin Zhang

摘要:

暗物质和重子物质贡献的能量密度与现在的宇宙相当。暗物质也可能是宇宙正电子/电子过剩的原因。我们把这些现象与中微子质量的狄拉克跷跷板联系起来。在我们的模型中,(i)暗物质残余密度是与重子不对称性同时产生的暗物质不对称性,因此我们可以自然地理解暗物质和重子物质之间的重合;(ii)暗物质大多衰变为轻子,因此它的衰变可以解释具有正电子/电子过剩的反常宇宙射线。

英文摘要:

Dark and baryonic matter contribute comparable energy density to the present Universe. The dark matter may also be responsible for the cosmic positron/electron excesses. We connect these phenomena with Dirac seesaw for neutrino masses. In our model (i) the dark matter relic density is a dark matter asymmetry generated simultaneously with the baryon asymmetry so that we can naturally understand the coincidence between the dark and baryonic matter; (ii) the dark matter mostly decays into the leptons so that its decay can interpret the anomalous cosmic rays with positron/electron excesses.

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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