在高亮度大型强子对撞机上Z'介导的超对称轻子和超中微子信号
Z'-Mediated Slepton and Sneutrino Signatures at HL-LHC
AI总结：
该研究在BLSSM框架下，分析HL-LHC中重Z'玻色子作为门户的超轻子和超中微子信号，发现2轻子+E_T^miss和2轻子+4喷注+E_T^miss是其主要发现道，直接超轻子衰变道在3000 fb⁻¹积分亮度下显著性超5σ。
AI中文摘要：
我们在B-L超对称标准模型（BLSSM）框架下，于高亮度大型强子对撞机（HL-LHC）中研究重Z'玻色子作为通向带电超轻子和右旋超中微子的门户的发现潜力。通过探测器级模拟和提升决策树（Boosted Decision Trees）来压低标准模型背景，我们发现直接超轻子衰变过程pp→Z'→ℓ̃⁺ℓ̃⁻→2轻子+横向缺失能量（E_T^miss）在积分亮度达3000 fb⁻¹时，统计显著性超过5σ；而级联（多轻子+E_T^miss）模式因事例率压低无法观测。对于右旋超中微子，强子道pp→Z'→ν̃_Rν̃_I→2轻子+4喷注+E_T^miss成为最具前景的信号。这些结果确立了2轻子+E_T^miss和2轻子+4喷注+E_T^miss末态为HL-LHC上BLSSM标量轻子区的主要发现道。
英文摘要：
We investigate the discovery potential of a heavy $Z'$ boson as a portal to charged sleptons and right-handed sneutrinos within the $B-L$ Supersymmetric Standard Model (BLSSM) at the High-Luminosity LHC. Using a detector-level simulation and Boosted Decision Trees to suppress Standard Model backgrounds, we find that the direct slepton decay $pp \to Z' \to \tilde{\ell}^+\tilde{\ell}^- \to 2\ell + E_{\rm T}^{\rm miss}$ yields a significance exceeding $5σ$ at 3000 fb$^{-1}$, while the cascade $(\mbox{multileptons} + E_{\rm T}^{\rm miss})$ mode is unobservable due to rate suppression. For right-handed sneutrinos, the hadronic channel $pp \to Z' \to \tildeν_R\tildeν_I \to 2\ell + 4j + E{\rm T}^{\rm miss}$ emerges as the most promising signature. These results establish the $2\ell + E_{\rm T}^{\rm miss}$ and $2\ell + 4j + E_{\rm T}^{\rm miss}$ final states as the principal discovery channels for the scalar leptonic sector of the BLSSM at the HL-LHC.
