Neighboring azimuthal bin-bin multiplicity correlation as a direct measure for the shear viscosity in relativistic heavy ion collisions  

作　　者：里霖 王美娟 吴元芳 

机构地区：[1]Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics,Central China Normal University [2]Physics Department,China University of Geoscience

出　　处：《Chinese Physics C》2013年第9期19-23,共5页中国物理C（英文版）

基　　金：Supported by NSFC(10835005,11221504);MOE of China(IRT0624,B08033);Fundamental Research Funds for Central Universities(CUGL 100237)

摘　　要：Neighboring azimuthal bin-bin multiplicity correlation is suggested to be a good measure for internal layer-to-layer interactions of the formed matter in relativistic heavy ion collisions. It is shown to be directly related to the shear viscosity of the formed matter. As an application of this method, the shear viscosity in the samples generated by a multi-phase transport model （AMPT） is estimated. The results are in qualitative agreement with the theoretical calculation from microscopic interactions, i.e., the larger the scattering cross section, the smaller the shear viscosity.Neighboring azimuthal bin-bin multiplicity correlation is suggested to be a good measure for internal layer-to-layer interactions of the formed matter in relativistic heavy ion collisions. It is shown to be directly related to the shear viscosity of the formed matter. As an application of this method, the shear viscosity in the samples generated by a multi-phase transport model （AMPT） is estimated. The results are in qualitative agreement with the theoretical calculation from microscopic interactions, i.e., the larger the scattering cross section, the smaller the shear viscosity.

关 键 词：neighboring azimuthal bin-bin multiplicity correlation shear viscosity relativistic heavy ion collision 

分 类 号：O571.6[理学—粒子物理与原子核物理]