论文标题
通过多粒子的触觉镜头与苯金石的碰撞能量依赖性探索QCD相图
Exploring the QCD phase diagram via the collision energy dependence of multi-particle femtoscopy with PHENIX
论文作者
论文摘要
QCD相图的丰富结构的探索是RHIC重型离子程序中的重要主题。该计划的最终目标之一是搜索关键端点。使用相同玻色子的Bose-Einstein相关性在各种相变点上对强子排放的时空结构的研究可能会提供有关临界终点位置的见解。 Phenix已经对SQRT（SNN）= 15、19、27、39、62.4和200 GEV的Au+Au碰撞中的Bose-Einstein相关性进行了全面的测量，在此我们结合了征用式源源功能以描述测得的相关功能。我们特别关注征收型源函数的参数之一，即稳定性alpha的索引，该索引与关键指数之一（所谓的相关指数ETA）有关。我们已经测量了其碰撞能量和中心性依赖性。我们还将分析从两粒子扩展到三粒子相关性，以表征强子发射源的性质。三个粒子相关性证实了两粒子相关性的发现，还提供了对核心 - 哈洛模型以外的触发生产机制的见解。
Exploration of the rich structure of the QCD phase diagram is an important topic in the RHIC heavy ion program. One of the ultimate goals of this program is to search for the critical endpoint. Investigation of the space-time structure of hadron emissions at various phase transition points using Bose-Einstein correlations of identical bosons may provide insight on the location of the critical endpoint. PHENIX has performed comprehensive measurements of the Bose-Einstein correlation in Au+Au collisions at sqrt(sNN) = 15, 19, 27, 39, 62.4, and 200 GeV, where we incorporated Levy-type source functions to describe the measured correlation functions. We put particular focus on one of the parameters of the Levy-type source functions, the index of stability alpha, which is related to one of the critical exponents (the so-called correlation exponent eta). We have measured its collision energy and centrality dependence. We have also extended our analysis from two-particle to three-particle correlations to characterize the nature of the hadron emission source. The three particle correlations confirmed the findings of the two-particle correlations, and also provide insight on the pion production mechanism beyond the core-halo model.
