高能重离子碰撞中末态粒子分布的非对称性

对Bevalac1.2A GeV Au+Au碰撞实验,根据以流方向为z轴的质心坐标系中末态粒子方位角分布的非对称性为极小的条件,确定了事件中五种质量范围(A=1,2,3,4,5-8)末态粒子的集合侧向流流角.在以流方向为z轴的质心坐标系中研究了不同质量末态粒子极角分布,结果表明质量越大的粒子在流方向分布得越集中,侧向流的“流”值越大.     

Effects of multi-collisions and surface on elliptic flow

The non-central Au+Au collision at center-of-mass energy √s_NN=200 GeV is simulated using AMPT model. It is found that both the integral and differential elliptic flow behaves differently for partons freezing out at different stages. It is shown that the integral elliptic flow of freeze-out partons decreases with time at the early stage, but increases with time at the late stage. The curve of transverse momentum distribution of elliptic flow of partons is more flatter at the early stage than at the late stage. The effect of surface emitting on elliptic flow is argued to be not neglectable.     

600A MeV Au+Au碰撞的挤压效应分析

对600A MeV Au+Au碰撞实验的挤压效应进行了研究.在方位角分布分析的基础上,完成了对挤压效应的定量测量,有效地消除了估计反应平面离散对测量结果的影响.     

Size of the freeze-out source in high energy heavy ion collisions

Based on a hydro-inspired azimuthally symmetric emission function, we analyze the HBT radius R_s and the single-particle transverse momentum spectra in Au+Au collisions measured by the STAR Collaboration at √s_NN=200 GeV. The results show that consistent assumptions about transverse density (and/or flow profile) in the calculation of the HBT radius R_s and single-particle spectral analyses play an important role for understanding the size of the freeze-out source.     

A Non-Zero Hadronic Elliptic Flow with a Vanished Partonic Elliptic Flow in a Coalescence Scenario

The elliptic flow of a hadron is calculated using a quark coalescence model based on the quark phase space distribution produced by a free streaming locally thermalized quark in a two-dimensional transverse plane at initial time. Without assuming the quark＇s elliptic flow, it is shown that the hadron obtains a non-zero elliptic flow in this model. The elliptic flow of the hadron is shown to be sensitive to both space momentum correlation and the hadron＇s internal structure. Quark number scaling is obtained only for some special cases.     

隐性通识教育课程的建设——大学物理中隐性通识教育资源的开发

发挥大学物理基础课教学涵盖面广的特点,通过物理教学环节的设计及教学内容的挖掘,将大学物理建设成为一门隐性通识教育课程.     

高能重离子碰撞中的横向非对称流

对末态粒子方位角分布的研究可以获得反应中有关横向非对称流的信息.研究了碰撞中侧向流与椭圆流间的方位角关联,给出了一种定量测量反应中椭圆流大小的方法,该方法的计算结果可以有效地消除估计反应平面离散的影响.     

大学物理教学内容的模块化处理及教学设计

在理工科高等学校中, 大学物理课程是各专业学生的一门通识性必修基础课程, 在大学基础课程中占 有重要地位. 该课程在承担知识传授任务的同时, 还应该担负培养学生分析、 解决问题的能力及探索、 创新意识等方 面的功能. 为了更好地实现这一教学目标, 我们将大学物理核心内容划分为4个模块, 并对每一模块提出了具体的 教学方案     

Single-particle space-momentum angle distribution effect on two-pion HBT correlation in high-energy heavy-ion collisions

We analyze the transverse momentum dependence of HBT radii in relativistic heavy-ion collisions using several source models.Results indicate that the single-particle space-momentum angle distribution plays an important role in the transverse momentum dependence of HBT radii.In a cylinder source,we use several formulas to describe the transverse momentum dependence of HBT radii and the single-particle space-momentum angle distribution.We also make a numerical connection between them in the transverse plane.     

与量子输运方程相一致的夸克经典输运方程

用Sμν作为描述夸克自旋的动力学变量建立了它的经典输运方程，并讨论了该方程与量子输运方程的一致性，通过一致性的比较探讨了经典分布函数在色空间和自旋空间的一些特性.