Initial fluctuation effect on harmonic flows in high-energy heavy-ion collisions
Initial fluctuation effect on harmonic flows in high-energy heavy-ion collisions
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DOI：
10.1103/physrevc.84.064907
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发表时间：
2011-05
影响因子：
3.1
通讯作者：
L. Han;G. Ma;Y. Ma;X. Cai;J. Chen;S. Zhang;C. Zhong
中科院分区：
文献类型：
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作者：
L. Han;G. Ma;Y. Ma;X. Cai;J. Chen;S. Zhang;C. Zhong
在多相输运模型的框架内，研究了v root（s）NN = 200 GeV的Au-Au碰撞和root（s）NN = 2.76 TeV的Pb-Pb碰撞的谐波流v（n）（n = 2，3，4）.事件的几何起伏显着有助于谐波流。三角流（v（3））起源于初始三角性（v（3）），并由部分子相互作用发展。转换效率（v（n）/v（n））随谐波阶数的增加而减小，随部分子相互作用截面的增加而增大。低pT区域的质量排序和中pT区域的组分夸克数标度似乎大致适用于两种能量的n次谐波流。在BNL相对论重离子对撞机和CERN大型强子对撞机能量下，谐波流的所有特征都表现出相似的定性行为，这意味着在两个能量下形成的部分子物质是相似的。
Within the framework of a multiphase transport model, harmonic flows v(n) (n = 2, 3, and 4) are investigated for Au-Au collisions at v root(s)NN = 200 GeV and Pb-Pb collisions at root(s)NN = 2.76 TeV. The event-by-event geometry fluctuations significantly contribute to harmonic flows. Triangular flow (v(3)) originates from initial triangularity (epsilon(3)) and is developed by partonic interactions. The conversion efficiency (v(n)/epsilon(n)) decreases with the harmonic order and increases with the partonic interaction cross section. A mass ordering in the low-pT region and a constituent quark number scaling in the middle-pT region seem to work roughly for nth harmonic flows at both energies. All features of harmonic flows show similar qualitative behaviors at BNL Relativistic Heavy Ion Collider and CERN Large Hadron Collider energies, which implies that the formed partonic matters are similar at the two energies.