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arXiv 0706.3196astro-ph
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低能超重暗物质与UHECR各向异性

Super Heavy Dark Matter and UHECR Anisotropy at Low Energy

R. Aloisio, F. Tortorici

摘要:

超重准稳定粒子是在早期宇宙中自然产生的,可以代表暗物质的一个重要部分:所谓的超重暗物质(SHDM)。SHDM的衰变也代表了超高能宇宙射线(UHECR)的可能来源,衰变$(\propto E^{-1.9})$中产生的粒子的可靠计算光谱。UHECR产生的SHDM模型只能定量地解释AGASA观测到的UHE事件的过量。在观测光谱未显示AGASA过量的情况下,SHDM模型只能提供对UHECR通量的{ \it次显性}贡献。我们在这里讨论的基本特征SHDM生产的{ \it subdominant} UHECR通量,我们指我们的研究可能的签名的模型在俄歇天文台讨论特别是预期的化学成分和各向异性。

英文摘要:

Super Heavy quasi-stable particles are naturally produced in the early universe and could represent a substantial fraction of the Dark Matter: the so-called Super Heavy Dark Matter (SHDM). The decay of SHDM represents also a possible source of Ultra High Energy Cosmic Rays (UHECR), with a reliably calculated spectrum of the particles produced in the decay $(\propto E^{-1.9})$. The SHDM model for the production of UHECR can explain quantitatively only the excess of UHE events observed by AGASA. In the case of an observed spectrum not showing the AGASA excess the SHDM model can provide only a {\it subdominant} contribution to the UHECR flux. We discuss here the basic features of SHDM for the production of a {\it subdominant} UHECR flux, we refer our study to the possible signatures of the model at the Auger observatory discussing in particular the expected chemical composition and anisotropy.

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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