发表机构
HUN-REN Wigner Research Centre for Physics（匈牙利科学院维格纳物理研究中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过PYTHIA模拟和Lund喷注平面分析，发现包含色弦结的模型能重现重子-介子比随z的上升趋势，并区分了弦结与热碎裂两种重子增强机制，为未来ALICE 3实验提供了可观测物理量。
AI 中文摘要
本文利用PYTHIA模拟$\u221as=14$ TeV的pp碰撞，在兼容未来ALICE 3探测器的接收度内，研究了带电喷注重子-介子比在Lund喷注平面中的行为，其中15 < $p_{\rm T}^{\rm ch,jet}$ < 30 GeV/$c$。喷注重聚类采用Cambridge-Aachen算法，并在重子首次从主导分支分离的劈裂处标记已识别的强子。比较了三种模型配置：Monash、超越领先色（CR-BLC）的颜色重连，以及CR-BLC与热力学弦碎裂（Thermal+CR-BLC）的组合。在包含色弦结的两种配置中，$\Lambda_c^+/{\rm D}^0$比值随$\log(1/z)$上升，而在Monash配置下近似平坦。这一趋势在首次Cambridge-Aachen分支处同样存在，表明该效应由色拓扑决定，而非多次软劈裂的累积作用。轻夸克和奇异夸克扇区的比值未显示任何机制随$z$变化的特征，但角投影在首次分支处揭示了非平凡结构，该结构在发射求和后被抹平。Cambridge-Aachen去聚类与Lund平面共同分离了PYTHIA中两种重子增强机制的运动学特征，并为未来ALICE 3测量提供了可观测的物理量。
英文摘要
Baryon-to-meson ratios inside charged jets are studied in the Lund jet plane using PYTHIA simulations of pp collisions at $\sqrt{s} = 14$ TeV, with 15 < $p_{\rm T}^{\rm ch,jet}$ < 30 GeV/$c$ in an acceptance compatible with the future ALICE 3 detector. Jets are reclustered with the Cambridge--Aachen algorithm and identified hadrons are tagged at the splitting where they first separate from the leading branch. Three model configurations are compared: Monash, color reconnection beyond leading color (CR-BLC), and CR-BLC combined with thermodynamical string fragmentation (Thermal+CR-BLC). The $Λ_c^+/{\rm D}^0$ ratio rises with $\log(1/z)$ in the two configurations that include color-string junctions and is approximately flat under Monash. The same trend is present at the first Cambridge--Aachen branching, indicating that the effect is set at the level of the color topology rather than through the cumulative action of many soft splittings. Light- and strange-sector ratios show no $z$-dependent signature of either mechanism, but the angular projection reveals non-trivial structure at the first branching that is washed out when emissions are summed. The Cambridge--Aachen declustering and the Lund plane together separate the kinematic signatures of the two baryon-enhancement mechanisms in PYTHIA and provide observables accessible to future ALICE 3 measurements.
CommentsSubmitted to JPhysG
Journal refJ. Phys. G: Nucl. Part. Phys. 53 095106 (2026)
