论文标题
研究奇怪的哈德子的冻结动力学
Study of freeze-out dynamics of strange hadrons
论文作者
论文摘要
我们从均质和各向同性扩展的$π，k，ρ，n，λ$和$σ$的奇异颗粒（$ K，\，λ，\，σ$）的化学冻结动力学中，具有零净净重男性元。我们使用动量集成的玻尔兹曼方程，并研究它们在散装腺体物质上的进化，这种情况与在TOP RHIC和LHC能量中产生的情况相似。横截面输入到方程式中，是从现象学模型中获取的，或通过与实验数据进行比较来进行参数化。从这个微观计算中，我们发现这些奇怪的颗粒在过渡温度附近冻结了$ \ of t_c $，这是由于大量放松时间。由于温度逐渐下降而导致的非弹性过程的连续停止，因此数量密度下降，因此导致早期冻结奇怪的Hadrons $ K，λ$和$σ$，依次在$ T_C $附近发生。然而，TC附近的这些奇怪物种的冻结似乎是一个突然而同时的过程，这主要是由热模型预测的，同时解释了RHIC和LHC能量的鉴定颗粒的产量。
We study the chemical freeze-out dynamics of strange particles ($K,\, Λ,\, Σ$) from a homogeneous and isotropically expanding hadronic system of $π, K, ρ, N, Λ$ and $Σ$ with zero net baryon density. We use the momentum integrated Boltzmann equation and study their evolution over the bulk hadronic matter, a condition being similar to the one created at top RHIC and LHC energies. The cross-sections, which are input to the equations, are taken either from phenomenological models or parameterized by comparing against experimental data. From this microscopic calculation we find that these strange particles freeze-out near transition temperature $\approx T_c$ due to large relaxation time. The continuous cease of the inelastic processes due to gradual fall in the temperature and decrease in the number density, thus lead to early freeze out of strange hadrons $K, Λ$ and $Σ$ which happens sequentially near $T_c$. However, freeze-out of these strange species near Tc appears as a sudden and simultaneous process, which is mostly predicted by thermal model while explaining the yield of identified particles at RHIC and LHC energies.
