Shear Viscosity to Entropy Density Ratio in Au+Au Central Collisions

ZHOU Chenglong (周铖龙); MA Yugang (马余刚); FANG Deqing (方德清)

doi:10.1088/1009-0630/14/7/04

Plasma Science and Technology > 2012 > 14(7): 585-587. > DOI: 10.1088/1009-0630/14/7/04

ZHOU Chenglong (周铖龙), MA Yugang (马余刚), FANG Deqing (方德清). Shear Viscosity to Entropy Density Ratio in Au+Au Central Collisions[J]. Plasma Science and Technology, 2012, 14(7): 585-587. DOI: 10.1088/1009-0630/14/7/04

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Shear Viscosity to Entropy Density Ratio in Au+Au Central Collisions

1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2 Graduate School of Chinese Academy of Sciences, Beijing 100080, China

Funds: supported byNational Natural Science Foundation of China (Nos. 11035009, 10979074, 10775167, 10775168), the Major State Basic Research Development Program in China(No. 2007CB815004), and the Shanghai Development Foundation for Science and Technology (No. 09JC1416800), the Knowledge Innovation Project of Chinese Academy of Sciences (No. KJCX2-EW-N01).

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Received Date: May 16, 2011

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Abstract

Abstract

The shear viscosity (η) and entropy density (s) are studied for the central Au+Au collisions with the help of a microscopic transport model, namely the isospin-dependent quantum molecular dynamic model (IQMD). Employ the formula given in ref.[1], η is calculated as a time dependent variable for different incident energies from 40MeV/u to 120MeV/u and the energy dependence of η/s of nuclear matter in the most compressed stage in collision process is displayed.
- shear viscosity,
- entropy density,
- heavy ion collision

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