RHIC能区的Landau流体力学模型研究

RHIC能区的Landau流体力学模型研究 Study of Landau Hydrodynamic Model at RHIC Energy Region 李双 LI Shuang1 1 first-author 冯笙琴 FENG Shengqin1 1 2 三峡大学理学院 三峡大学理学院 College of Science,China Three Gorges University College of Science,China Three Gorges University 武汉大学物理科学与技术学院 武汉大学物理科学与技术学院 School of Physics and Technology,Wuhan University School of Physics and Technology,Wuhan University 在RHIC能区,末态产生粒子的快度分布并未表现为Bjorken流体力学理论所预言的中心快度平台分布特征,而与Landau流体力学模型所预测的相对论重离子碰撞末态粒子分布特征一致.本文利用Landau1+1维流体力学模型研究RHIC能区产生粒子的快度分布,讨论了在RHIC能区流体的横向膨胀位移对纵向快度分布的影响,由此得到的修正Landau流体力学模型可以很好地解释RHIC能区末态产生粒子π±、K±和反质子p等快度分布特征. It is found that the rapidity distributions of final state particles at RHIC are constituent with the prediction of Landau hydrodynamic model,but not constituent with the features of central plat rapidity distributions predicated by Bjorken.The effect of transverse expansion displacement on longitudinal rapidity distributions is considered when we use Landau 1+1 hydrodynamic model to discuss the rapidity distribution at RHIC.The modified Landau hydrodynamic model can explain the experimental results of production particles such as π±、K±and p-at RHIC energy region. Landau流体力学模型 纵向膨胀 横向膨胀位移 RHIC能区 高斯分布 Landau hydrodynamic model longitudinal expansion transverse expansion displacement RHIC energy region Gaussian distribution 10.14188/j.1671-8836.2010.06.003 O35;O572.21 国家自然科学基金资助项目（10975091）;湖北省教育厅重大科研项目（Z20081302） 2010-06-01 2021-04-01 6 56