用DarkLight寻找不可见的A'矢量玻色子
Searching for an invisible A' vector boson with DarkLight
摘要：
高光度实验能够在低能量下寻找新的物理学，由于与标准模型的耦合非常弱，迄今为止可能无法探测到。杰斐逊实验室的暗光实验旨在通过衰变A' -> e+ e-寻找质量范围为10-100 MeV的新U（1）矢量玻色子A'。在本文中，我们证明了暗光也是敏感的A'衰减到不可见的最终状态。我们分析了暗光达到无形的A'玻色子假设名义上两个月的运行时间，包括可能性的扩大暗光设计，包括光子探测。我们还提出了两种新的分析技术，可能会被证明是有用的其他高光度搜索：削减丢失的能量，以提高不变质量的分辨率，和削减丢失的不变质量平方的符号，以减轻堆积。我们比较暗光达到现有的实验建议，包括使用VEPP-3正电子束的互补搜索。
英文摘要：
High-luminosity experiments are able to search for new physics at low energies, which could have evaded detection thus far due to very weak couplings to the Standard Model. The DarkLight experiment at Jefferson Lab is designed to search for a new U(1) vector boson A' in the mass range 10-100 MeV through its decay A' -> e+ e-. In this paper, we demonstrate that DarkLight is also sensitive to an A' decaying to invisible final states. We analyze the DarkLight reach for invisible A' bosons assuming a nominal two month running time, including the possibility of augmenting the DarkLight design to include photon detection. We also propose two new analysis techniques that might prove useful for other high-luminosity searches: a cut on missing energy to improve the invariant mass resolution, and a cut on the sign of the missing invariant mass-squared to mitigate pileup. We compare the DarkLight reach to existing experimental proposals, including a complementary search using the VEPP-3 positron beam.
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