arXiv 2104.025742021-04hep-phhep-exhep-th

来自重磁单极子的亲光强子轴子

Photophilic hadronic axion from heavy magnetic monopoles

Anton V. Sokolov, Andreas Ringwald

备注：: 23 pages, 2 figures
发表信息：: J. High Energ. Phys. 2021, 123 (2021)
DOI：: 10.1007/JHEP06(2021)123

摘要：

我们提出了一个QCD轴子模型，它是通过Peccei-Quinn标量场与高能磁荷费米子的耦合来实现的。我们表明，该模型的轴子解决了强CP问题，然后整合出重磁单极子使用Schwinger适当的时间方法。我们发现，该模型讨论产生轴子耦合的标准模型，这是从KSVZ/DFSZ型模型内的计算有很大的不同，所以相应的参数空间的大部分可以探测各种投影实验。此外，我们介绍的轴子是一致的天体物理暗示所建议的异常TeV透明的宇宙和过度冷却的水平分支恒星在球状星团。我们认为，宇宙轴子丰度的主导项是没有改变相比，传统的前膨胀QCD轴子的情况下，轴子衰变常数$f_a > 10^{12}~\text{GeV}$。

英文摘要：

We propose a model for the QCD axion which is realized through a coupling of the Peccei-Quinn scalar field to magnetically charged fermions at high energies. We show that the axion of this model solves the strong CP problem and then integrate out heavy magnetic monopoles using the Schwinger proper time method. We find that the model discussed yields axion couplings to the Standard Model which are drastically different from the ones calculated within the KSVZ/DFSZ-type models, so that large part of the corresponding parameter space can be probed by various projected experiments. Moreover, the axion we introduce is consistent with the astrophysical hints suggested both by anomalous TeV-transparency of the Universe and by excessive cooling of horizontal branch stars in globular clusters. We argue that the leading term for the cosmic axion abundance is not changed compared to the conventional pre-inflationary QCD axion case for axion decay constant $f_a > 10^{12}~\text{GeV}$.

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