超相对论性轻离子和重离子碰撞中多重数的受伤部分子标度
Wounded parton scaling of multiplicities in ultra-relativistic light- and heavy-ion collisions
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中文总结 AI 辅助
研究超相对论性轻离子和重离子碰撞中带电粒子多重数，在受伤部分子格点玻尔兹曼框架内，用相同模型参数拟合实验多重数分布，在特定中心度范围避免外围事件影响，对\(c\lesssim1\%\)的系统多重数分布有恰当描述。
中文摘要 AI 辅助
在具有叠加负二项式涨落的受伤部分子格点玻尔兹曼框架内，以统一方式研究了在\(\sqrt{s_{NN}}\sim5\) TeV下的O + O、Ne + Ne、Xe + Xe和Pb + Pb碰撞中产生的带电粒子多重数。在该模型中，核子的非弹性相互作用通过其组成部分子来建模，部分子数量是一个参数，每个核子有四个部分子时描述最佳。我们直接拟合实验多重数分布（直方图），对每个反应使用相同模型参数。拟合在\(c = 1 - 80\%\)中心度范围内进行。避免最外围事件使该方法对因难以分离库仑相互作用导致的归一化问题不敏感，而最中心碰撞可能涉及不同粒子产生机制。我们发现对于\(c\lesssim1\%\)，该模型能对所有研究系统的多重数分布进行恰当描述。
英文摘要
Multiplicities of charged particles produced in O+O, Ne+Ne, Xe+Xe, and Pb+Pb collisions at $\sqrt{s_{NN}} \sim 5$~TeV are studied in a uniform way within a wounded parton Glauber framework with overlaid negative binomial fluctuations. In this model, the nucleon's inelastic interaction is modeled via its constituent partons, whose number is a parameter, with best description obtained with four partons per nucleon. We fit directly the experimental multiplicity distributions (histograms), using {\it the same model parameters} for each reaction. The fit is performed in the c=1--80 $\%$ centrality range. Avoiding the most peripheral events makes the method insensitive to the normalization issues caused by the difficulty in separating the Coulomb interactions, whereas the most central collisions may involve a different particle production mechanism. We find a proper model description of multiplicity distributions across all the studied systems for $c \lesssim 1\%$.
