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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1709.09466hep-phhep-lat
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轴子暗物质与晶格

Axion dark matter and the Lattice

Guy D. Moore

摘要:

首先,我将回顾QCD θ问题和Peccei-Quinn解,以及它的新粒子轴子。我将回顾轴子作为暗物质的可能性。如果PQ对称性在热的早期宇宙的某个点上恢复,那么如果轴子构成了暗物质,就应该有可能对轴子质量做出明确的预测。我将描述在一个问题上的进展,这个问题需要做出这个预测--轴子弦壁网络的动力学以及它们如何产生轴子。然后讨论计算对高温QCD拓扑磁化率的敏感性。我的重点是什么温度范围是重要的,什么水平的精度是必要的。

英文摘要:

First I will review the QCD theta problem and the Peccei-Quinn solution, with its new particle, the axion. I will review the possibility of the axion as dark matter. If PQ symmetry was restored at some point in the hot early Universe, it should be possible to make a definite prediction for the axion mass if it constitutes the Dark Matter. I will describe progress on one issue needed to make this prediction -- the dynamics of axionic string-wall networks and how they produce axions. Then I will discuss the sensitivity of the calculation to the high temperature QCD topological susceptibility. My emphasis is on what temperature range is important, and what level of precision is needed.

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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