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首页> 外文期刊>Physics Letters, B. Nuclear Physics and High Energy Physics >Di-hadron azimuthal correlation and Mach-like cone structure in a parton/hadron transport model
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Di-hadron azimuthal correlation and Mach-like cone structure in a parton/hadron transport model

机译：Parton /强子传输模型中的双强子方位相关性和类Mach锥结构

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In the framework of a multi-phase transport model (AMPT) with both partonic and hadronic interactions, azimuthal correlations between trigger particles and associated scattering particles have been studied by the mixing-event technique. The momentum ranges of these particles are 3 < p(T)(trig) < 6 GeV/c and 0. 15 < pa(T)(assoc) < 3 GeV/c (soft), or 2.5 < p(T)(trig) < 4 GeV/c and 1 < p(T)(assoc) < 2.5 GeV/c (hard)in An + Au collisions at root s(NN) = 200 GeV. A Mach-like structure has been observed in correlation functions for central collisions. By comparing scenarios with and without parton cascade and hadronic rescattering, we show that both partonic and hadronic dynamical mechanisms contribute to the Mach-like structure of the associated particle azimuthal correlations. The contribution of hadronic dynamical process cannot be ignored in the emergence of Mach-like correlations of the soft scattered associated hadrons. However, hadronic rescattering alone cannot reproduce experimental amplitude of Mach-like cone on away-side, and the Parton cascade process is essential to describe experimental amplitude of Mach-like cone on away-side. In addition, both the associated multiplicity and the sum Of PT decrease, while the < PT > increases, with the impact parameter in the AMPT model including partonic dynamics from string melting scenario. (c) 2006 Elsevier B.V. All rights reserved.
机译：在具有部分和强子相互作用的多相传输模型（AMPT）的框架中，已通过混合事件技术研究了触发粒子与相关散射粒子之间的方位角相关性。这些粒子的动量范围为3 （T）（trig）<6 GeV / c和0. 15 a（T）（assoc）<3 GeV / c（soft）或2.5 （T）（ trig）<4 GeV / c和1 （T）（assoc）<2.5 GeV / c（硬），根s（NN）= 200 GeV的An + Au碰撞。在中心碰撞的相关函数中已经观察到类似马赫的结构。通过比较具有和不具有parton级联和强子散射的情形，我们显示了部分和强子动力学机制都对相关粒子方位相关性的Mach型结构有贡献。强子动力过程的贡献在软散布相关强子的马赫样相关中的出现是不容忽视的。然而，仅强子散射不能在远侧再现Mach样锥的实验振幅，Parton级联过程对于在远侧描述Mach样锥的实验振幅是必不可少的。此外，关联的多重性和PT的总和均减小，而增大，而AMPT模型中的影响参数包括来自弦融解场景的声子动力学。 （c）2006 Elsevier B.V.保留所有权利。

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