标题： 高阶累积量的堆积修正 显示英文标题

标题： Pileup corrections on higher-order cumulants

摘要： 我们提出了一种方法，用于从事件级粒子分布的高阶累积量和矩中去除多次碰撞事件的贡献。假设多次碰撞事件是由两个独立单次碰撞事件的叠加给出的，我们证明了每个多重性区间内的真实矩可以从较低多重性的事件递归地获得。在修正过程中，所需信息仅为多次碰撞事件的概率，其他项则从实验数据中提取。我们演示了通过这种方法可以在简单模型中成功重建真实累积量。讨论了触发效率损失和修正参数的系统性问题。 显示英文摘要

摘要： We propose a method to remove the contributions of pileup events from higher-order cumulants and moments of event-by-event particle distributions. Assuming that the pileup events are given by the superposition of two independent single-collision events, we show that the true moments in each multiplicity bin can be obtained recursively from lower multiplicity events. In the correction procedure the necessary information are only the probabilities of pileup events. Other terms are extracted from the experimental data. We demonstrate that the true cumulants can be reconstructed successfully by this method in simple models. Systematics on trigger inefficiencies and correction parameters are discussed.