LHC能区铅-铅碰撞中强子化及其关联的唯象理论研究

粒子产生是高能重离子碰撞领域的重要研究方向之一。不同于低横动量区的流体力学和高能量区的微扰理论，夸克重组合模型是中间横动量区粒子产生最可行的方法。基于以上考虑，本项目将利用重组合模型讨论LHC能区核-核碰撞中可识别粒子的产生及其关联，具体内容包括以下几个方面：（1）LHC能区产生的热密介质的性质；（2）RHIC能区低横动量区的ridge产生机制及分布，并推广至LHC能区；（3）利用夸克重组合唯象模型，在仔细考虑半硬部分子能量损失对轴向角的依赖基础上，研究铅-铅（Pb-Pb）非中心碰撞中的粒子产生，讨论核修正因子、集体流和两粒子关联等物理观测量；（4）讨论LHC能区末态粒子谱的标度行为，并与RHIC能区的结果相比较。我们希望通过这些工作了解更多关于高能碰撞系统的演化信息，进一步发展和完善夸克重组合模型。

The partilce production in high energy heavy ion collisions is one of the subjects of particular current interest in nuclear physics. Based on the scientific project of LHC, we expect a large quantity of data reveal the properties of hot and dense medium created in Pb-Pb collisions in the next few years. We propose to study such properties in the intermediate region between the hydrodynamical region at low transverse momentum and the perturbative region at high transverse momentum. Hadronization based on quark recombination is the most suitable approach for that region. Our emphasis will be on the spectra of identified hadrons and their correlations, which are listed as follows: (1) The properties of the dense medium created at LHC; (2) The production mechanism of ridge and its distribution in the low transverse momentum at RHIC, then extend to LHC; (3) With careful considerations on the azimuthal dependence of momentum degradation, we'll study the particle production in non-central Pb-Pb collisions, including nuclear modification factor, anisotropic collective flow, two-partical correlation at high collision energies with quark recombination model; (4) With the exprimental data from RHIC and LHC to investigate the scaling behavior of final particle distribution. We hope to understand better about the evolution of colliding system and improve the quark reombination model by the above works.