The QCD Axion from Aligned Axions and Diphoton Excess
The QCD Axion from Aligned Axions and Diphoton Excess
复制标题
DOI：
10.1016/j.physletb.2016.01.055
复制
发表时间：
2015-12
影响因子：
4.4
通讯作者：
Tetsutaro Higaki;K. Jeong;N. Kitajima;F. Takahashi
中科院分区：
文献类型：
--
作者：
Tetsutaro Higaki;K. Jeong;N. Kitajima;F. Takahashi
我们认为 QCD 轴子可以由许多对齐的轴子产生，其衰减常数比传统轴子窗口小得多。如果典型的衰变常数为 O (100) GeV 至 1 TeV，则一个或多个轴子或萨克子可以解释最近发现的~ 750 GeV 处的双光子过剩。我们的场景预测许多轴子和萨克子与具有弱尺度衰变常数的胶子耦合，因此重轴子和萨克子的许多碰撞特征将出现在不同的能量尺度上。特别是，如果推断的宽衰减宽度是由多个轴子或萨克子引起的，则当收集更多数据时，非平凡的峰结构可能会变得明显。我们还讨论了对齐的 QCD 轴子场景的宇宙学含义。在附录中，我们给出了可能的 UV 补全，并认为 Peccei-Quinn 对称性的高质量在我们的场景中得到了自然的解释。
We argue that the QCD axion can arise from many aligned axions with decay constants much smaller than the conventional axion window. If the typical decay constant is of O (100) GeV to 1 TeV, one or more of the axions or saxions may account for the recently found diphoton excess at∼ 750 GeV. Our scenario predicts many axions and saxions coupled to gluons with decay constants of order the weak scale, and therefore many collider signatures by heavy axions and saxions will show up at different energy scales. In particular, if the inferred broad decay width is due to multiple axions or saxions, a non-trivial peak structure may become evident when more data is collected. We also discuss cosmological implications of the aligned QCD axion scenario. In the Appendix we give a possible UV completion and argue that the high quality of the Peccei–Quinn symmetry is naturally explained in our scenario.