论文标题
部分化学平衡的共振产生
Resonance production in partial chemical equilibrium
论文作者
论文摘要
在高能量碰撞中，可以产生密集的，强烈的相互作用的介质，即夸克gluon等离子体。在快速膨胀的过程中，从夸克和胶子的汤中，在化学冷冻输出时形成了共振和稳定颗粒的气体，此后，随着系统的冷却，动力学冷冻散发会发生并在颗粒之间的相互作用停止。通过测量共振比，可以获取有关中等温度范围中主要物理过程的信息，即化学和动力学冻结之间。这些数量在RHIC和LHC能量下测量。在目前的分析中，我们采用了假设部分化学平衡来表征这些测量数据的强子共振气体模型。我们计算几种共振与它们稳定的对应物的比率，并将这些模型计算与可用的实验数据进行比较。
In high energy collisions, a dense, strongly interacting medium could be created, the quark gluon plasma. In rapid expansion, from the soup of quarks and gluons a gas of resonance and stable particles is formed at the chemical freeze-out and after that, as the system cools down, the kinetic freeze-out takes place and interaction between particles ceases. By measuring resonance ratios one could get information about the dominant physical processes in the intermediate temperature ranges, i.e. between the chemical and kinetic freeze-out. These quantities are measured at RHIC and LHC energies. In the present analysis we employ the hadron resonance gas model assuming partial chemical equilibrium to characterize these measured data. We calculate the ratios of several resonances to their stable counterpart and compare these model calculations to available experimental data.
