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arXiv 2007.04990hep-phastro-ph.COhep-th
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更多来自弦的公理

More Axions from Strings

Marco Gorghetto, Edward Hardy, Giovanni Villadoro

摘要:

我们研究的贡献,QCD轴子暗物质丰度,产生的弦缺陷在所谓的标度制度。标度违反的明确证据被发现,最保守的外推强烈建议大量的轴子从字符串。在这一制度中,在QCD标度附近的非线性被证明在确定最终丰度中发挥重要作用。总体结果是,在后暴胀的情况下,QCD轴子质量的下限比未对准的情况下要强得多。

英文摘要:

We study the contribution to the QCD axion dark matter abundance that is produced by string defects during the so-called scaling regime. Clear evidence of scaling violations is found, the most conservative extrapolation of which strongly suggests a large number of axions from strings. In this regime, nonlinearities at around the QCD scale are shown to play an important role in determining the final abundance. The overall result is a lower bound on the QCD axion mass in the post-inflationary scenario that is substantially stronger than the naive one from misalignment.

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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