标题： 粲偶素在微观朗之万模拟中的离解与再生 显示英文标题

标题： Dissociation and regeneration of charmonia within microscopic Langevin simulations

摘要： 我们提出了一种经典模型，利用朗之万模拟研究粲偶素的形成，以及夸克胶子等离子体中重夸克束缚态的解离和再生过程。 在背景轻夸克和胶子介质中，描述粲夸克和反粲夸克为布朗粒子，并通过库仑型屏蔽势相互作用形成束缚态，这些束缚态会因与介质的相互作用而再次解离。 固定温度和体积的盒子模拟被用于验证系统在平衡极限下达到预期的热分布，并测试束缚态性质。 然后，介质的演化通过一个洛伦兹不变的火球来参数化。 在这种构型下，研究了RHIC和LHC能量下粲夸克、反粲夸克以及粲偶素的椭圆流。 显示英文摘要

摘要： We present a classical model to study the formation of charmonia, as well as dissociation and regeneration processes of heavy-quark bound states in the quark gluon plasma using Langevin simulations. The charm and anticharm quarks are described as Brownian particles in the background medium of light quarks and gluons and interact among them over a Coulomb-like screened potential to form bound states, which can dissociate again due to interactions with the medium. Box simulations at fixed temperature and volume are used to verify that the system reaches the expected thermal distribution in the equilibrium limit and to test bound state properties. The medium evolution is then parametrized by a boost-invariant fireball. In this configuration, the elliptic flow of charm and anticharm quarks as well as of charmonia is studied at RHIC and LHC energies.