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

  • 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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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
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 shu
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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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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
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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