在未来$e^+e^-$对撞机上探测第一代单态类矢量轻子的单产生
Probing the Single Production of First-Generation Singlet Vector-like Leptons at Future $e^+e^-$ Colliders
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中文总结 AI 辅助
本研究针对未来$e^+e^-$对撞机，探究第一代单态类矢量轻子的单产生过程，通过蒙特卡洛模拟分析信号与背景，给出ILC和CLIC的排除及发现可达范围，为探测该类新粒子提供有效途径。
中文摘要 AI 辅助
我们研究了未来$e^+e^-$对撞机上第一代弱单态类矢量轻子（VLL）的单产生过程，考虑了含$E^{\pm} \to W^{\pm}ν_e$和$E^{\pm} \to e^{\pm}Z$的$e^+e^- \to e^{\pm}E^{\mp}$过程道。对于所研究的重类矢量轻子质量，高度洛伦兹增强的$W$和$Z$玻色子的衰变产物会合并为单个胖喷注，为信号识别和背景压低提供了有力的手段。我们在国际直线对撞机（ILC）的$\sqrt{s}=1$ TeV运行能级和紧凑型直线对撞机（CLIC）的1.5 TeV运行能级下开展了全面的蒙特卡洛模拟。针对代表性基准质量，我们确定了作为积分亮度和混合参数$\sinθ_L$函数的$2σ$排除可达范围与$5σ$发现可达范围。结果表明，未来$e^+e^-$对撞机可通过这些过程道有效探测第一代单态类矢量轻子方案。1 TeV的ILC可探测质量最高达900 GeV的该类粒子，而1.5 TeV的CLIC可将探测范围拓展至1400 GeV，其结果优于强子对撞机的现有限制，且可与电弱精确测量给出的约束形成互补。
英文摘要
We study the single production of first-generation weak-isosinglet vector-like leptons (VLLs) at future $e^+e^-$ colliders, considering the channels $e^+e^- \to e^{\pm}E^{\mp}$ with $E^{\pm} \to W^{\pm}ν_e$ and $E^{\pm} \to e^{\pm}Z$. For the heavy VLL masses under consideration, the decay products of the highly boosted $W$ and $Z$ bosons merge into a single fat-jet, providing a powerful handle for signal identification and background suppression. A comprehensive Monte Carlo simulation is carried out at $\sqrt{s}=1$ TeV at the International Linear Collider (ILC) and 1.5 TeV at the Compact Linear Collider (CLIC). The $2σ$ exclusion and $5σ$ discovery reaches are determined as functions of the integrated luminosity and the mixing parameter $\sinθ_L$ for representative benchmark masses. Our results show that future $e^+e^-$ colliders can effectively probe the first-generation singlet VLL scenario through these channels. The 1 TeV ILC can probe masses up to 900 GeV, while the 1.5 TeV CLIC extends the reach to 1400 GeV, surpassing existing limits from hadron colliders and complementing constraints from electroweak precision measurements.
