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首页> 外文期刊>Physical review, C >Effect of centrality bin width corrections on two-particle number and transverse momentum differential correlation functions
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Effect of centrality bin width corrections on two-particle number and transverse momentum differential correlation functions

机译：中心箱宽度校正对双粒子数和横向动量差异相关函数的影响

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摘要

Two-particle number and transverse momentum differential correlation functions are powerful tools for unveiling the detailed dynamics and particle production mechanisms involved in relativistic heavy-ion collisions. Measurements of transverse momentum correlators P-2 and G(2), in particular, provide added information not readily accessible with better known number correlation functions R-2. However, it is found that the R-2 and G(2) correlators are somewhat sensitive to the details of the experimental procedure used to measure them. They exhibit, in particular, a dependence on the collision centrality bin width, which may have a rather detrimental impact on their physical interpretation. A technique to correct these correlators for collision centrality bin-width averaging is presented. The technique is based on the hypothesis that the shape of single- and pair-probability densities vary slower with collision centrality than the corresponding integrated yields. The technique is tested with Pb-Pb simulations based on the HIJING and ultrarelativistic quantum molecular dynamics models and shown to enable a precision better than 1% for particles in the kinematic range 0.2 <= p(T) <= 2.0 GeV/c.
机译：双粒子数和横向动量差分相关功能是揭示相对论重离子碰撞中涉及的详细动态和颗粒生产机制的强大工具。横向动量相关器P-2和G（2）的测量，特别是通过更好地已知的数字相关函数R-2提供不容易访问的添加信息。然而，发现R-2和G（2）的相关器对用于测量它们的实验过程的细节有些敏感。它们特别地，依赖于碰撞中心箱宽度，这可能对其物理解释产生相当有害的影响。提出了一种校正碰撞中心BIN宽平均的这些相关器的技术。该技术基于单位和对概率密度的形状随着相应的集成产量而变化的形状变化。该技术基于HEIRE和UtherAlativistum Modallum Modemics模型用PB-PB仿真进行测试，并显示在运动范围0.2 <= P（t）<= 2.0 gev / c中的粒子优于1％的精度。

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