论文标题
在电子离子对撞机上搜索重的中性Lepton：雪花白皮书
Heavy Neutral Lepton Searches at the Electron-Ion Collider: A Snowmass Whitepaper
论文作者
论文摘要
在此白皮书中，我们将重型中性瘦素（HNL）的模型视为探索电子离子对撞机（EIC）新物理搜索潜力的一个例子。我们根据HNL寿命提出了两种类别的搜索策略：直接搜索HNL的迅速衰减，其寿命很短，并且对长期寿命的顶点搜索流离失所。在确定了最有希望的信号和相应的背景之后，我们进行了详细的模拟，以估计EIC对HNL的敏感性，考虑探测器阈值，分辨率和几何学接受。我们将EIC覆盖率的投影推导到HNL平方混合角，在电子风味混合优势假设下HNL质量的函数。我们的发现表明，EIC可以对及时搜索的现有约束提供可比的敏感性，而流离失所的顶点搜索可以涵盖1-10 GEV质量范围内HNL的大量新基础。我们提出的策略通常也适用于其他新物理场景，并激发了EIC的其他现象学探索和未来搜索。
In this whitepaper, we consider the model of heavy neutral leptons (HNLs) as an example to explore the potential of new physics searches at the Electron-Ion Collider (EIC). We propose two broad categories of search strategies depending on the HNL lifetime: direct searches for the prompt decay of HNLs with a short lifetime and displaced vertex searches for long-lived ones. After identifying the most promising signals and the corresponding backgrounds, we perform a detailed simulation to estimate the sensitivity of the EIC to HNLs, accounting for detector thresholds, resolutions, and geometric acceptance. We derive projections for the EIC reach to the HNL squared mixing angle as a function of the HNL mass under the electron flavor mixing dominance hypothesis. Our findings indicate that the EIC can provide comparable sensitivity to the existing constraints for the prompt searches, while the displaced vertex searches can cover substantial new ground for HNLs in the 1-10 GeV mass range. Our proposed strategies are generally applicable to other new physics scenarios as well and motivate additional phenomenological exploration and dedicated future searches at the EIC.
