标题： 簇生成和膨胀热密物质中的化学冻结 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相关联，讨论QCD相图中轻簇态产生的介质效应。 在LHC提供的最高能量重离子碰撞中，由于重子密度较低，轻簇态的丰度应遵循统计模型。 在此区域，化学冻结与QCD交叉转变相关。 在低能区域，核碎片生成区，冻结过程与液气相变相互干扰，自能和泡利阻塞效应很重要。 我们证明，在中间能量下，化学冻结线与核结合态的最大质量分数相关，特别是$\alpha$粒子。 在此区域，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.