AI 中文总结
研究利用PYTHIA莫纳什模拟，探究√s = 2.76 TeV的pp碰撞中颜色重连对净电荷涨落的影响，与实验数据对比发现当前模拟设置高估涨落，确认CR引起真实动态变化，且不同通道抑制情况有别，为实验提供基准并揭示潜在动力学。
AI 中文摘要
本工作利用变量ν（+，-，动态），通过PYTHIA莫纳什模拟，探究在质心能量√s = 2.76 TeV的pp碰撞中，各种颜色重连（CR）配置对带电粒子净电荷涨落的影响。将结果与ALICE的实验数据比较，发现当前PYTHIA模拟设置高估了净电荷涨落。ν（+，-，动态）对MPICR范围参数有明显依赖性，增加范围会使ν（+，-，动态）值更负。通过与固定多重性下重新调整的无CR基线比较，确认CR在涨落中引起真实动态变化，且与平均带电粒子密度无关。研究还表明，净电荷和净π介子通道在〈Nch〉ν（+-，动态）中抑制最强。总体而言，该研究为实验结果提供有用基准，并揭示PYTHIA莫纳什的潜在动力学。
英文摘要
This work explores the effects of various color reconnection (CR) configurations on the net charge fluctuations of charged particles generated in $pp$ collisions at a center-of-mass energy of $\sqrt{s}$ = 2.76 TeV, simulated with the PYTHIA Monash using the variable $ν_{(+,-,\text{dyn})}$. The results are compared with experimental data from ALICE, revealing that the current PYTHIA simulation settings overestimate the net charge fluctuations relative to the experimental observations. Furthermore, $ν_{(+,-,\text{dyn})}$ exhibits a clear dependence on the MPICR range parameter, where increasing the range leads to more negative $ν_{(+,-,\text{dyn})}$ values, suggesting the geometric extent of CR directly modulates the strength of local charge correlation. To ensure these effects are not a trivial consequence of particle density, a comparison with a retuned NoCR baseline at fixed multiplicity was performed. This analysis confirms that CR induces a genuine dynamical shift in fluctuations that persists independently of the average charged-particle density. The study also shows that the net charge and net pion channels display the strongest suppression in $\langle N_{\text{ch}} \rangle ν_{(+-,\text{dyn})}$ compared to the net kaon and net proton channels. Overall, the study offers a useful benchmark against experimental results and sheds light on the underlying dynamics of the PYTHIA Monash.
Comments17 pages, 5 figures
