论文标题
在jlab上搜索电源生产的$ e^+e^ - $ e^ - $ e^ - $对搜索迅速和长寿的深色光子。
Searching for Prompt and Long-Lived Dark Photons in Electro-Produced $e^+e^-$ Pairs with the Heavy Photon Search Experiment at JLab
论文作者
论文摘要
托马斯·杰斐逊国家加速器设施的重型光子搜索实验（HPS）搜索了电产生的深色光子。我们报告了2016年工程运行的结果，该运行由10608/NB的数据组成，用于提示和流离失所的顶点搜索。搜索$ e^+e^ - $不变的质量分布在39至179 MeV之间的提示共振，与以前的搜索一致，限制了大QED背景上方的暗光子上方的迹象，限制了ε^2 {\ geq} 10^-5的耦合。对流离失所的顶点的搜索没有表现出在60至150 MeV之间的背景上过量信号的证据，但亮度不足以限制规范重型光子的产生。这是HPS发布的第一个流离失所的顶点搜索结果。 HPS在2019年和2021年运行了高光度数据，该数据将探索新的深色光子相空间。
The Heavy Photon Search experiment (HPS) at the Thomas Jefferson National Accelerator Facility searches for electro-produced dark photons. We report results from the 2016 Engineering Run consisting of 10608/nb of data for both the prompt and displaced vertex searches. A search for a prompt resonance in the $e^+e^-$ invariant mass distribution between 39 and 179 MeV showed no evidence of dark photons above the large QED background, limiting the coupling of ε^2 {\geq} 10^-5, in agreement with previous searches. The search for displaced vertices showed no evidence of excess signal over background in the masses between 60 and 150 MeV, but had insufficient luminosity to limit canonical heavy photon production. This is the first displaced vertex search result published by HPS. HPS has taken high-luminosity data runs in 2019 and 2021 that will explore new dark photon phase space.
