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

作　　者：周铖龙 马余刚 方德清 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences [2]Graduate School of Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2012年第7期585-587,共3页等离子体科学和技术（英文版）

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

摘　　要：The shear viscosity （7） 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 40 MeV/u to 120 MeV/u and the energy dependence of η/s of nuclear matter in the most compressed stage in collision process is displayed.The shear viscosity （7） 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 40 MeV/u to 120 MeV/u and the energy dependence of η/s of nuclear matter in the most compressed stage in collision process is displayed.

关 键 词：shear viscosity entropy density heavy ion collision 

分 类 号：O571.6[理学—粒子物理与原子核物理]