标题： 系统尺寸对二粒子方位角关联的扫描在超相对论重离子碰撞中 显示英文标题

标题： System-size scan of dihadron azimuthal correlations in ultra-relativistic heavy ion collisions

摘要： 系统尺寸对超相对论重离子碰撞中二强子方位角关联的影响由多相输运模型进行模拟。 关联函数的结构和伴随粒子的产率在具有部分子相的碰撞系统中显示出明显的参与者路径长度依赖性。 远离侧关联函数的分裂参数和均方根宽度随着碰撞系统尺寸从$^{14}$N+$^{14}$N 增加到$^{197}$Au+$^{197}$Au 碰撞而增加。 远离侧关联函数的双峰结构只能在部分子相下足够“大”的碰撞系统中形成。 部分子相结果与强子气体结果之间的对比可能为研究禁闭解除的开始提供一些线索。 显示英文摘要

摘要： System-size dependence of dihadron azimuthal correlations in ultra-relativistic heavy ion collision is simulated by a multi-phase transport model. The structure of correlation functions and yields of associated particles show clear participant path-length dependences in collision systems with a partonic phase. The splitting parameter and root-mean-square width of away-side correlation functions increase with collision system size from $^{14}$N+$^{14}$N to $^{197}$Au+$^{197}$Au collisions. The double-peak structure of away-side correlation functions can only be formed in sufficient "large" collision systems under partonic phase. The contrast between the results with partonic phase and with hadron gas could suggest some hints to study onset of deconfinment.