Trace initial interaction from final state observable in relativistic heavy ion collisions

WANG Mei-Juan; LIU Lian-Shou; WU Yuan-Fang

doi:10.1088/1674-1137/33/1/008

Chinese Physics C> 2009, Vol. 33> Issue(1) : 36-41 DOI: 10.1088/1674-1137/33/1/008

Trace initial interaction from final state observable in relativistic heavy ion collisions

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Abstract：
In order to trace azimuthal angle dependence of the initial interaction in ultra-relativistic heavy ion collision, two azimuthal multiplicity-correlation patterns
— neighboring and fixed-to-arbitrary angular-bin correlation patterns — are suggested. From the simulation of Au + Au collisions at √S_NN=200 GeV by using the Monte Carlo models RQMD with hadron re-scattering and AMPT with and without string melting, we observe that the correlation patterns change
gradually from out-of-plane preferential one to in-plane preferential one when the centrality of collision shifts from the central collision to peripheral collision, meanwhile the anisotropic collective flow v₂ keeps positive in all cases. This regularity is found to be collision energy independent. The physics behind the
two opposite trends of correlation patterns, in particular, the presence of out-of-plane correlation patterns at RHIC energy, are discussed.

References

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WANG Mei-Juan, LIU Lian-Shou and WU Yuan-Fang. Trace initial interaction from final state observable in relativistic heavy ion collisions[J]. Chinese Physics C, 2009, 33(1): 36-41. doi: 10.1088/1674-1137/33/1/008

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Received: 2008-04-03
Revised: 2008-05-15

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Trace initial interaction from final state observable in relativistic heavy ion collisions

Corresponding author: WANG Mei-Juan,

Received Date: 2008-04-03

Accepted Date: 2008-05-15

Available Online: 2009-01-11

Abstract:

In order to trace azimuthal angle dependence of the initial interaction in ultra-relativistic heavy ion collision, two azimuthal multiplicity-correlation patterns
— neighboring and fixed-to-arbitrary angular-bin correlation patterns — are suggested. From the simulation of Au + Au collisions at √S_NN=200 GeV by using the Monte Carlo models RQMD with hadron re-scattering and AMPT with and without string melting, we observe that the correlation patterns change
gradually from out-of-plane preferential one to in-plane preferential one when the centrality of collision shifts from the central collision to peripheral collision, meanwhile the anisotropic collective flow v₂ keeps positive in all cases. This regularity is found to be collision energy independent. The physics behind the
two opposite trends of correlation patterns, in particular, the presence of out-of-plane correlation patterns at RHIC energy, are discussed.

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Trace initial interaction from final state observable in relativistic heavy ion collisions

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