论文标题
对沙丘和沙丘复合物的沙子检测器对重中性瘦素的敏感性
Sensitivity to Heavy Neutral Leptons with the SAND detector at the DUNE ND complex
论文作者
论文摘要
在过去的几年中，重型中性瘦素（HNL）一直是实验粒子物理学的一个有趣的话题。在探测器复合物附近的多仪器沙丘的框架内进行了一项研究，特别是关于轴上系统的研究，以评估暴露的六年内对HNL的敏感性。通过利用两个MC发电机和Charmed重型介子衰减通道，已经探索了对HNL质量0.3至1.8 GEV/$ C^2 $的敏感性。基于$νmsm$ lagrangian实施了疯狂的graph/mad-dump模型，并用于获得梅森和hnl衰减的准确运动学。模拟的最终状态颗粒已通过检测器传播。基于卡尔曼滤波器技术的轨道重建算法以及简单的两体衰减选择，以估算效率和背景拒绝。 HNL灵敏度既从纯粹的现象学和实验的角度估计，对于更高的HNL质量达到O（$ 10^{ - 9} $），在现象学和实验案例之间大约有一个因子3恶化。在本文中，已经研究了Charmed Meson $ d_s $ to HNL的直接和间接衰减渠道的结果，并讨论了进一步改进的潜力。
Heavy Neutral Leptons (HNLs) have been an interesting topic for experimental particle physics in the past few years. A study has been performed within the framework of the multi-instrument DUNE near detector complex, specifically regarding the on-Axis System, to assess the sensitivity to HNL within six years of exposure. By utilizing two MC generators, and charmed heavy meson decay channels, the sensitivity to HNL masses between 0.3 and 1.8 GeV/$c^2$ has been explored. A Mad-Graph/Mad-Dump model has been implemented based on the $νMSM$ Lagrangian, and used to obtain accurate kinematics for the decay of mesons and HNL. The simulated final-state particles have been propagated through the detector; a track reconstruction algorithm, based on the Kalman Filter technique, along with a simple two-body decay selection, is implemented to estimate efficiency and background rejection. The HNL sensitivity has been estimated both from purely phenomenological as well as experimental point of view, reaching O($10^{-9}$) for higher HNL masses, with about a factor 3 deterioration between the phenomenological and the experimental case. In this paper, the results for direct and indirect decay channels of charmed meson $D_s$ to HNL has been investigated and the potential for further improvements has been discussed.
