论文标题
黑暗Z在国际线性对撞机上
Dark Z at the International Linear Collider
论文作者
论文摘要
深色Z是一个巨大的Abelian仪表玻色子，通过动力学和质量混合与Electroweak扇形耦合到标准模型。我们研究了在能量范围电子峰值对撞机上的黑暗Z的现象学，例如拟议的国际线性对照坞（ILC）。我们表明，Precision Electroweak约束和来自强子山子的电流边界允许在ILC上具有250 GEV或500 GEV GEV质量中心能量的ILC访问的黑暗Z。此外，ILC搜索深色Z的范围显着超过了高光度LHC的预期范围。如果发现与黑暗Z一致的信号，它将激发与深色Z质量相匹配的质量中心能量的专用ILC运行。我们证明，短短一个月的设计亮度可以以百分比精度来测量深色Z手性耦合。该测量可用于区分共鸣的竞争理论模型：例如，可以将黑暗Z与具有纯粹动力学混合的深色光子区分开。
A dark Z is a massive Abelian gauge boson which is coupled to the Standard Model through both kinetic and mass mixing with the electroweak sector. We study the phenomenology of the dark Z at an energy-frontier electron-positron collider, such as the proposed International Linear Collider (ILC). We show that precision electroweak constraints and the current bounds from the hadron colliders allow a dark Z that is kinematically accessible at the ILC with 250 GeV or 500 GeV center-of-mass energy. Further, the reach of the ILC searches for a dark Z significantly exceeds the expected reach of the high luminosity LHC. If a signal consistent with a dark Z is discovered, it would motivate a dedicated run of the ILC at the center-of-mass energy matching the dark Z mass. We demonstrate that a short one month run at design luminosity could measure the dark Z chiral couplings to fermions with percent precision. This measurement can be used to discriminate between competing theoretical models of the resonance: for example, the dark Z can be distinguished from a dark photon with purely kinetic mixing.
