组合模型中初态条件和衔接方法对末态强子性质的研究

项目名称： 组合模型中初态条件和衔接方法对末态强子性质的研究

项目编号： No.11205066

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 程筠

作者单位： 华中师范大学

项目金额： 22万元

中文摘要： 在高能重离子碰撞中，对末态强子特性的研究，是近代高能核碰撞领域中研究核反应机制和探求核物质本质的基本研究方向之一。本项目拟用理论唯象模型，即相对论流体力学模型和粒子输运模型相结合的组合模型，模拟高能重离子碰撞过程中从初态到末态的演化，主要考虑初态选择，衔接方法，和各个阶段采用不同的状态方程，对末态强子参量，如带电强子的快度分布，多重数分布，尤其是集体流等参量的影响进行分析，以了解重离子碰撞中形成的系统从强子相到夸克胶子等离子体相的相变信息，并通过与实验数据的比较改进组合模型（Hydro-Paciae Model）。

中文关键词： 组合模型；流体动力学；PACIAE；椭圆流；非统计涨落

英文摘要： In the high energy heavy-ion collisions, the research on the characters of final hadrons, is one of the study directions to explore the nuclear reaction mechanisms and the nature of nuclear matter. The project applies the phenomenological model, a combining theoretic model with the relativistic hydrodynamic model and the particle transport model, to simulate the evolution from the initial state to final states during the whole process in high energy heavy ion collision. Considering the choices of different initial state and methods of the matching condition, with the equation of state in individual stages, to study the final parameters, such as charged hadrons distribution, the multiplicity distribution, as well as the collective flow.In addition, our hybrid model(Hydro-Paciae Model) should be improved by comparing and analysis with the experimental data, to obtain the information on the phase transition from hardonic phase to quark-gluon plasma phase during the system formed in heavy ion collisions.

英文关键词： Hybrid model；hydrodynamics；PACIAE；elliptic flow；non-statistical flctuation