论文标题
一阶QCD相变的重离子碰撞中光核的产量比增强
Enhanced yield ratio of light nuclei in heavy ion collisions with a first-order QCD phase transition
论文作者
论文摘要
使用包含党与辐射物质之间的一阶手性相变的传输模型，我们研究了重离子碰撞中产生的物质密度波动的发展，因为它发生了相变，以及它们在后来的碰撞碰撞阶段的时间演变。使用聚结模型来描述动态冻结处的核子中的杜特龙和triton的产生，我们发现产量比$ n_ \ text {t} n_ \ text {t} n_ \ text {p}/ n_ \ text {p}如果QCD相图中产生的物质的进化轨迹通过一阶手性相变的旋缺座区域，则分别增强了质子，杜特龙和特里顿的数量。
Using a transport model that includes a first-order chiral phase transition between the partonic and the hadronic matter, we study the development of density fluctuations in the matter produced in heavy ion collisions as it undergoes the phase transition, and their time evolution in later hadronic stage of the collisions. Using the coalescence model to describe the production of deuterons and tritons from nucleons at the kinetic freeze out, we find that the yield ratio $ N_\text{t}N_\text{p}/ N_\text{d}^2$, where $N_\text{p}$, $N_\text{d}$, and $N_\text{t}$ are, respectively, the proton, deuteron, and triton numbers, is enhanced if the evolution trajectory of the produced matter in the QCD phase diagram passes through the spinodal region of a first-order chiral phase transition.
