论文标题
介绍Hydjet ++模型中电荷平衡函数的中心性依赖性
Toward a description of the centrality dependence of the charge balance function in the HYDJET++ model
论文作者
论文摘要
来自大型强生对撞机的数据在质量中心能量的PB+PB碰撞中的充电平衡函数2.76〜TEV每个核子对，并在\ hydjet ++模型的框架内分析并解释。该模型使我们能够在相对较低的横向动量间隔中定性重现平衡函数宽度的实验观察到的中心性依赖性，这是由于软和硬过程中的电荷创造机制不同。但是，在这些间隔中对平衡函数的完全充分描述意味着通过通过规范而不是大规范合奏包含精确的电荷保护，对模型进行了必不可少的修改。提出了将电荷相关性引入热模型的过程，而无需更改其他模型参数。随着横向动量的增加，默认模型结果更好地描述了实验数据，因为在这些横向动量间隔中，模型的软分子的贡献大大减少。实际上，有一个电荷相关性的过渡，即在每个阶段确切的电荷保存中所保持的喷气机中的电荷相关性。
Data from the Large Hadron Collider on the charge balance function in Pb+Pb collisions at center-of-mass energy 2.76~TeV per nucleon pair are analyzed and interpreted within the framework of the \hydjet++ model. This model allows us to qualitatively reproduce the experimentally observed centrality dependence of the balance function widths at relatively low transverse momentum intervals due to the different charge creation mechanisms in soft and hard processes. However, a fully adequate description of the balance function in these intervals implies an essential modification of the model by including exact charge conservation via the canonical rather than the grand canonical ensemble. A procedure is proposed for introducing charge correlations into the thermal model without changing other model parameters. With increasing transverse momenta, the default model results describe the experimental data much better because the contribution of the soft component of the model is significantly reduced in these transverse momentum intervals. In practical terms, there is a transition to a single source of charge correlations, namely, charge correlations in jets in which exact charge conservation holds at each stage.
