高能核碰撞中轻反原子核和奇特原子核产生及其特性研究

项目名称： 高能核碰撞中轻反原子核和奇特原子核产生及其特性研究

项目编号： No.11475149

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 陈刚

作者单位： 中国地质大学（武汉）

项目金额： 68万元

中文摘要： 在高能碰撞实验中，最初产生的高温高密核物质类似于宇宙大爆炸初始阶段的环境，这为研究宇宙演化早期物质形态、寻找奇特物质和研究反物质提供了有效途径。本项目，在PACIAE模型的基础上，从动力学原理出发，构建一个PACIAE+动力学约束的相空间组合模型，模拟高能碰撞实验中轻(反)原子核和奇特物质(超核、反超核和含奇异夸克束缚态)的产生。利用该模型产生数据，我们还将做以下工作：研究轻(反)原子核和奇特物质的产额及正反物质的比率；研究轻(反)核和奇特物质的各向异性流及其涨落，检验椭圆流分布质量组分夸克数目的标度性，探索系统早期的解禁闭信号；研究轻(反)原子核和奇特物质的各种物理特性及特性差异，探讨从部分子到轻(反)原子核的演化过程中强相互作用的物理机理；研究轻(反)核与重子之间的关联参数、重子化学势和温度对碰撞能量的依赖关系，寻找解禁闭相变的位置及夸克素相存在的可能信息。

中文关键词： 高能碰撞；轻反原子核与奇特原子核；组合模型；QCD相变；夸克素

英文摘要： The high-temperature and high-density nuclear matter originally produced in the high energy collision experiments are similar to the environment of the initial stages of the Big Bang, which provides an effective way to study the state of matter of in the early evolution of the universe, and look for the strange substances and antimatter. In this project, according to the dynamical principle, a dynamically constrained phase-space coalescence model on the basis of the PACIAE model will be built, to simulate the production of the light anti-nuclei and strange matter(hypernuclei, anti-hypernuclei, and bound states containing a strange quark) in high energy collision experiments. We use this model to generate MC simulation of data for the following research: firstly, we can investigate the yields and their ratios of light anti-nuclei and the strange matter，and compare it with the experimental results from RHIC and make a prediction about the case of higher energy, such as LHC experiment . Secondly, the anisotropic flow of the light (anti-) nuclear and strange matter will be studied to test the order of mass for elliptic flow distribution and constituent quark number scaling, and explore the de-confinement signal in the evolution process of the system. Thirdly，through studying the physical characteristics of light (anti-) nuclei and strange (anti-) matters and the differences of these properties, we explore the physical mechanism of the strong interaction from parton evolution to the final combination of a light (anti-) nuclei and strange (anti-) matter in the high energy collision experiments. Lastly, we are looking for the deconfinement phase transition position and information that may exist quarkyonic matter by studying the correlation parameter between the light (anti-) nuclei and the baryon, baryon chemical potential and the temperature of the energy dependence in mid-high energy collisions.

英文关键词： high-energy collision;light anti-nuclei and hyper-antinuclei;. coalescence model;QCD phase transition;quarkyonic matter