Enhanced axion-photon coupling in GUT with hidden photon
Enhanced axion-photon coupling in GUT with hidden photon
复制标题
通过隐藏光子增强 GUT 中的轴子-光子耦合
DOI：
10.1016/j.physletb.2018.03.039
复制
发表时间：
2018
影响因子：
4.4
通讯作者：
Yokozaki Norimi
中科院分区：
文献类型：
--
作者：
Daido Ryuji;Takahashi Fuminobu;Yokozaki Norimi
如果规范耦合统一是通过超荷和未破缺的隐含U(1)H之间的大的动力学混合χ=O(0.1)来实现的，那么在具有单个Peccei-Quinn场的简单模型中，可以增强轴子与光子的耦合。关键的观察结果是，U(1)H规范耦合应该相当强，才能引起如此大的动力学混合，从而导致隐藏物质场对电磁反常的贡献增强。我们发现，与E/N=8/3的肠轴模型相比，轴子-光子耦合增强了约10-100倍。
We show that the axion coupling to photons can be enhanced in simple models with a single Peccei–Quinn field, if the gauge coupling unification is realized by a large kinetic mixing χ= O (0.1) between hypercharge and unbroken hidden U (1) H. The key observation is that the U (1) H gauge coupling should be rather strong to induce such large kinetic mixing, leading to enhanced contributions of hidden matter fields to the electromagnetic anomaly. We find that the axion–photon coupling is enhanced by about a factor of 10–100 with respect to the GUT-axion models with E/N= 8/3.