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arXiv 1210.0191hep-phastro-ph.CO
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非热Wino暗物质在小尺度结构上的印记

Imprints of Non-thermal Wino Dark Matter on Small-Scale Structure

Masahiro Ibe, Ayuki Kamada, Shigeki Matsumoto

摘要:

我们研究如何“温暖”的维诺暗物质时,它是非热产生的引力子在早期宇宙的衰变。阐明了引力子衰变时维诺的能量分布和产生后的能量损失过程。通过求解玻尔兹曼方程,我们表明,一个相当大的比例的维诺暗物质可以“温暖”的维诺质量m_{\tilde w} \sim 100-500 GeV。维诺暗物质的“温暖”在物质功率谱上留下了印记,并可能通过未来的21厘米线测量提供有关暗物质起源的进一步见解。我们的计算可以应用于其他非热wino生产方案,如wino暗物质产生的衰减的模场。

英文摘要:

We study how "warm" the wino dark matter is when it is non-thermally produced by the decays of the gravitino in the early Universe. We clarify the energy distribution of the wino at the decay of the gravitino and the energy loss process after their production. By solving the Boltzmann equation, we show that a sizable fraction of the wino dark matter can be "warm" for the wino mass m_{\tilde w} \sim 100-500 GeV. The "warmness" of the wino dark matter leaves imprints on the matter power spectra and may provide further insights on the origin of dark matter via the future 21 cm line survey. Our calculations can be applied to other non-thermal wino production scenarios such as the wino dark matter produced by the decay of the moduli fields.

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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