Pseudorapidity dependence of short-range correlations from a multi-phase transport model

Mei-Juan Wang; Gang Chen; Guo-Liang Ma; Yuan-Fang Wu

doi:10.1088/1674-1137/40/3/034105

Chinese Physics C> 2016, Vol. 40> Issue(3) : 034105 DOI: 10.1088/1674-1137/40/3/034105

Pseudorapidity dependence of short-range correlations from a multi-phase transport model

1.
Physics Department, China University of Geoscience, Wuhan 430074, China
2.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
3.
Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China

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Abstract：
Using a multi-phase transport model (AMPT) that includes both initial partonic and hadronic interactions, we study neighboring bin multiplicity correlations as a function of pseudorapidity in Au+Au collisions at √^SNN = 7.7-62.4 GeV. It is observed that for √^SNN < 19.6 GeV Au+Au collisions, the short-range correlations of final particles have a trough at central pseudorapidity, while for √^SNN > 19.6 GeV AuAu collisions, the short-range correlations of final particles have a peak at central pseudorapidity. Our findings indicate that the pseudorapidity dependence of short-range correlations should contain some new physical information, and are not a simple result of the pseudorapidity distribution of final particles. The AMPT results with and without hadronic scattering are compared. It is found that hadron scattering can only increase the short-range correlations to some level, but is not responsible for the different correlation shapes for different energies. Further study shows that the different pseudorapidity dependence of short-range correlations are mainly due to partonic evolution and the following hadronization scheme.
- short-range correlations ,
- hadronic interaction ,
- partonic evolution ,
- hadronization scheme

References

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Mei-Juan Wang, Gang Chen, Guo-Liang Ma and Yuan-Fang Wu. Pseudorapidity dependence of short-range correlations from a multi-phase transport model[J]. Chinese Physics C, 2016, 40(3): 034105. doi: 10.1088/1674-1137/40/3/034105

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Received: 2015-07-25
Revised: 2015-10-18

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Supported by GBL31512, Major State Basic Research Devolopment Program of China (2014CB845402), NSFC (11475149, 11175232, 11375251, 11421505, 11221504)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Pseudorapidity dependence of short-range correlations from a multi-phase transport model

Corresponding author: Mei-Juan Wang,

1. Physics Department, China University of Geoscience, Wuhan 430074, China

2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

3. Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China

Received Date: 2015-07-25

Accepted Date: 2015-10-18

Available Online: 2016-02-29

Fund Project: Supported by GBL31512, Major State Basic Research Devolopment Program of China (2014CB845402), NSFC (11475149, 11175232, 11375251, 11421505, 11221504)

Abstract: Using a multi-phase transport model (AMPT) that includes both initial partonic and hadronic interactions, we study neighboring bin multiplicity correlations as a function of pseudorapidity in Au+Au collisions at √^SNN = 7.7-62.4 GeV. It is observed that for √^SNN < 19.6 GeV Au+Au collisions, the short-range correlations of final particles have a trough at central pseudorapidity, while for √^SNN > 19.6 GeV AuAu collisions, the short-range correlations of final particles have a peak at central pseudorapidity. Our findings indicate that the pseudorapidity dependence of short-range correlations should contain some new physical information, and are not a simple result of the pseudorapidity distribution of final particles. The AMPT results with and without hadronic scattering are compared. It is found that hadron scattering can only increase the short-range correlations to some level, but is not responsible for the different correlation shapes for different energies. Further study shows that the different pseudorapidity dependence of short-range correlations are mainly due to partonic evolution and the following hadronization scheme.

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Pseudorapidity dependence of short-range correlations from a multi-phase transport model

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