论文标题
琴弦的更多轴
More Axions from Strings
论文作者
论文摘要
我们研究了所谓的缩放制度中弦缺陷产生的QCD轴轴线丰度的贡献。发现了明确的违规缩放率证据，最保守的外推强烈暗示了琴弦的大量轴。在这个制度中，QCD量表的非线性在确定最终丰度方面起着重要作用。总体结果是在通货膨胀后场景中的QCD轴质量上有一个下限，其强度比未对准的幼稚轴是强大的。
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.
