Blast-wave analysis for the radial flow of Au+Au collisions at 1 A GeV

LYV Ming; MA Yugang; ZHANG Guoqiang; CHEN Jinhui; FANG Deqing; CAO Xiguang; ZHOU Chenglong; HE Wanbing; DAI Zhitao; LIU Yingdu; WANG Tingting

doi:10.11889/j.0253-3219.2014.hjs.37.100517

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Blast-wave analysis for the radial flow of Au+Au collisions at 1 A GeV

更新时间：2021-03-03

- Blast-wave analysis for the radial flow of Au+Au collisions at 1 A GeV
- NUCLEAR TECHNIQUES Vol. 37, Issue 10, Article number: 100517(2014)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所嘉定园区,上海,201800
  2. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2014.hjs.37.100517
  CLC：
- Published：16 October 2014
- 稿件说明：
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LYV Ming, MA Yugang, ZHANG Guoqiang, et al. Blast-wave analysis for the radial flow of Au+Au collisions at 1 A GeV[J]. Nuclear techniques, 2014, 37(10): 100517
DOI：

LYV Ming, MA Yugang, ZHANG Guoqiang, et al. Blast-wave analysis for the radial flow of Au+Au collisions at 1 A GeV[J]. Nuclear techniques, 2014, 37(10): 100517 DOI： 10.11889/j.0253-3219.2014.hjs.37.100517.

摘要

径向流是重离子碰撞中研究高温高密核物质性质极为重要的实验可观测量。本文在同位旋相关的量子分子动力学(Isospin dependent Quantum Molecular Dynamics

IQMD)模型框架下，用爆炸波模型提取1 A GeV的Au+Au反应体系中的径向流和热力学冻结温度，发现径向流的大小由中心碰撞到周边碰撞逐渐减小，与FOPI(4π Collaboration)实验结果及其他模拟结果一致。同时详细分析了径向流参数α对拟合结果的影响，得出此能量下α合理取值范围应在0?1。

Abstract

Background: Heavy ion reaction is a unique method to investigate the high temperature and density nuclear matter in laboratory

and the radial flow is a very important experimental probe. Purpose: This paper aims to obtain the radial flow and freeze-out temperature and then compare them with experimental results. Methods: By simulating the Au+Au collision at 1 A GeV in the Isospin dependent Quantum Molecular Dynamics (IQMD) framework

the Blast-wave model was applied to fitting the proton transverse momentum spectra and getting the radial flow and freeze-out temperature. Results: Results show that the radial flow decreases from central to peripheral collisions

and the value at central collisions is consistent with the FOPI experimental result and other theory results. Additionally

the radial flow profile ? has been analyzed in details and ?=0.336 has been determined in this work. Conclusion: The Blast-wave model can nicely describe the proton transverse momentum spectra

and give a reasonable radial flow value in comparison with the FOPI and EOS experimental results. Varying the flow profile ? leads to a large change on the shape of proton and deuteron spectra

and the value between 0?1 is supported. Abstract

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Related Author

LYV Ming

MA Yugang

ZHANG Guoqiang

CHEN Jinhui

FANG Deqing

CAO Xiguang

ZHOU Chenglong

HE Wanbing

Related Institution

(Key Laboratory of Quark and Lepton Physics (MOE) & Institute of Particle Physics, Central China Normal University,,)

Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, 20

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