Diphoton excess from hidden U(1) gauge symmetry with large kinetic mixing,
Diphoton excess from hidden U(1) gauge symmetry with large kinetic mixing,
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来自隐藏 U(1) 规范对称性和大动力学混合的双光子过剩，
DOI：
10.1016/j.physletb.2016.07.013
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发表时间：
2016
影响因子：
4.4
通讯作者：
M.~Yamada and N.~Yokozaki
中科院分区：
文献类型：
--
作者：
F.~Takahashi;M.~Yamada and N.~Yokozaki
我们发现，750GeV双光子过剩可以通过引入类矢夸克和隐藏的费米子来解释，这些费米子是在隐藏的U(1)规范对称性下带电的，它具有相对较大的耦合常数以及与U(1)的显著的动力学混合。随着大的动力学混合，标准模型规范耦合在GeV附近统一，这表明大统一理论没有太快的质子衰变。我们的设想预测了有一个光子和缺少横向动量的事件，并且它的横截面与双光子通过动力学混合过剩的横截面有关。我们还讨论了其他可能的对撞机特征和宇宙学，包括逃避奇异稳定带电粒子约束的各种方法。在某些情况下，750 GeV双光子过剩是由二轴粒子衰变引起的，我们的方案还预测了三光子和四光子信号。
We show that the 750 GeV diphoton excess can be explained by introducing vector-like quarks and hidden fermions charged under a hidden U(1) gauge symmetry, which has a relatively large coupling constant as well as a significant kinetic mixing with U(1). With the large kinetic mixing, the standard model gauge couplings unify aroundGeV, suggesting the grand unified theory without too rapid proton decay. Our scenario predicts events with a photon and missing transverse momentum, and its cross section is related to that for the diphoton excess through the kinetic mixing. We also discuss other possible collider signatures and cosmology, including various ways to evade constraints on exotic stable charged particles. In some cases where the 750 GeV diphoton excess is due to diaxion decays, our scenario also predicts triphoton and tetraphoton signals.