标题： 在膨胀的高温稠密物质中的团簇产生和化学冻结出 显示英文标题

标题： Cluster production and the chemical freeze-out in expanding hot dense matter

摘要： 我们通过将Mott转变线与化学冻结线联系起来，讨论了QCD相图中介质效应对轻团簇产生的影响。在由LHC提供的最高能量的重离子碰撞中，由于低的重子密度，轻团簇丰度应该遵循统计模型。在这个区域内，化学冻结与QCD交叉过渡相关联。在低能量下，在核碎片区域，其中冻结与液气相变相互干扰时，自能和泡利阻塞效应是重要的。我们证明了在中间能量下，化学冻结线与核束缚态的最大质量分数相关，特别是与$\alpha$粒子相关。在这个区域内，HADES、FAIR和NICA实验可以提供新的见解。 显示英文摘要

摘要： We discuss medium effects on light cluster production in the QCD phase diagram by relating Mott transition lines to those for chemical freeze-out. In heavy-ion collisions at highest energies provided by the LHC, light cluster abundances should follow the statistical model because of low baryon densities. Chemical freeze-out in this domain is correlated with the QCD crossover transition. At low energies, in the nuclear fragmentation region, where the freeze-out interferes with the liquid-gas phase transition, self-energy and Pauli blocking effects are important. We demonstrate that at intermediate energies the chemical freeze-out line correlates with the maximum mass fraction of nuclear bound states, in particular $\alpha$ particles. In this domain, the HADES, FAIR and NICA experiments can give new insights.