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Measurement of Two-Particle Correlations with Respect to Second- and Third-Order Event Planes in Au+Au Collisions at √(s__nn)=200 GeV

Physical Review C(2019)SCI 2区SCI 1区

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Abstract
We present measurements of azimuthal correlations of charged hadron pairs in sNN=200 GeV Au+Au collisions for the trigger and associated particle transverse-momentum ranges of 14GeV/c) correlations is suppressed compared with that of correlations measured in p+p collisions. At the lowest associated particle pT(0.5
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RHIC Experiments,Heavy-Ion Collisions,Resonance
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要点】:本文研究了在√(sNN)=200 GeV的Au+Au碰撞中,二粒子相关性相对于第二和第三阶事件平面的测量,揭示了与p+p碰撞相比,低横动量相关性的抑制现象。

方法】:通过分析Au+Au碰撞中带电粒子对的方位相关性,使用事件平面来描述碰撞的各向异性。

实验】:研究使用了STAR实验的数据,对14 GeV/c < pT<trigger < 20 GeV/c的触发粒子以及1 GeV/c < pT<assoc < 4 GeV/c的相关粒子进行了测量,发现低横动量(0.5 < pT<assoc < 1 GeV/c)的相关性在Au+Au碰撞中相对于p+p碰撞受到了抑制。