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arXiv · 1509.06618

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

Meijuan Wang·Gang Chen·Guoliang Ma·Yuanfang Wu
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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 $\sqrt{s_{NN}} = 7.7-62.4$ GeV. It is observed that for $\sqrt{s_{NN}} < $19.6GeV Au+Au collisions, the short-range correlations of final particles have a trough at central pseudorapidity, while for $\sqrt{s_{NN}} > $19.6GeV 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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Meijuan Wang, Gang Chen, Guoliang Ma, Yuanfang Wu. 2015-09-22. Pseudorapidity dependence of short-range correlations from a multi-phase transport model. https://doi.org/10.1088/1674-1137%2F40%2F3%2F034105

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