论文标题
三个希格斯双重模型中的无异常轴向暗物质及其现象学的影响
Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications
论文作者
论文摘要
我们研究了由于无异常的全球风味对称性的自发破坏而导致的轴轴的现象学意义。这样的无异常轴解释暗物质（DM）的一种有趣的可能性是，当它具有大量的keV和中等规模的衰减常数时，可以通过直接搜索实验，X射线观测，各种出色的冷却过程进行探索，并且不对准机制自然解释了DM的含量。作为这种轴轴的具体重质量模型，我们考虑了一个具有全球风味对称性的扩展希格斯扇区，该扇形由三个Higgs Doublet Fields和三个带有$ U（1）_ {\ rm B-L} $电荷的Singlet Higgs Fields组成。我们确定了满足HIGGS电位和该模型各种实验限制的理论界限的可行参数区域，并评估轴突和额外的Higgs玻色子的质谱。我们发现，即使是无异常的轴，通常也可以通过与CP-ODD Higg混合将其搭配到光子，并且其强度取决于Higgs Doublets和Axion质量的真空期望值。结果，HigGS双重运动集的真空预期值的比率紧密地限制以满足X射线约束。我们显示了轴向DM解释Xenon1t过量的偏爱参数区域。我们还证明了轴 - 电子耦合与额外的希格斯玻色子质量和CP-even Higgs玻色子的混合角有关。因此，如果在将来的观测值中检测到轴，则额外的希格斯玻色子质量和标准模型样的希格斯玻色子与弱仪玻色子的耦合受到限制。这是搜索轴DM和Electroweak量表周围的BSM之间的协同作用的一个很好的例子。
We study phenomenological implications of an axion that arises as a pseudo Nambu-Goldstone boson due to the spontaneous breaking of anomaly-free global flavor symmetry. One interesting possibility for such anomaly-free axion to explain dark matter (DM) is when it has a mass of order keV and an intermediate scale decay constant, since it can be explored through direct search experiments, X-ray observations, various stellar cooling processes, and the misalignment mechanism naturally explains the DM abundance. As a concrete renormalizable model of such axion, we consider an extended Higgs sector with global flavor symmetry, which consists of three Higgs doublet fields and three singlet Higgs fields with $U(1)_{\rm B-L}$ charges. We identify viable parameter regions that satisfy theoretical bounds on the Higgs potential and various experimental limits on this model, and evaluate the mass spectra of the axion and extra Higgs bosons. We find that even an anomaly-free axion can generally couple to photons through mixing with CP-odd Higgs, and that its strength depends on the vacuum expectation values of the Higgs doublets as well as the axion mass. As a result, the ratios of the vacuum expectation values of the Higgs doublets are tightly constrained to satisfy the X-ray constraints. We show the favored parameter region where axion DM explains the XENON1T excess. We also demonstrate that the axion-electron coupling is correlated with the extra Higgs boson masses and mixing angles for CP-even Higgs bosons. Thus, if the axion is detected in future observations, the extra Higgs boson masses and the coupling of the standard model-like Higgs boson with the weak gauge bosons are restricted. This is a good example of the synergy between searches for the axion DM and the BSM around the electroweak scale.
