论文标题
重型离子碰撞的冷冻表面上的热波动及其对粒子相关的影响
Thermal fluctuations on the freeze-out surface of heavy-ion collisions and their impact on particle correlations
论文作者
论文摘要
在高能核碰撞中产生的源自夸克 - 胶质等离子体的粒子动量分布可能受流体动态场中的热波动的影响。我们通过允许在流体速度，化学势和温度平均的较小波动来概括常用的动力学冻结处方来研究这种效果。这导致了特定的两体动量相关性的出现。将动力学冻结表面的爆炸波参数化与理想谐振气体的热相关函数相结合，我们对围绕化学潜能的热波动引起的角度净荷利相关性进行了探索性研究。我们注意到，近侧峰的扩散在$Δy= δϕ = 0 $左右，这是由不同化学电位的方差引起的，可以实验研究。
Particle momentum distributions originating from a quark-gluon plasma as produced in high-energy nuclear collisions can be influenced by thermal fluctuations in fluid dynamic fields. We study this effect by generalizing the commonly used kinetic freeze-out prescription by allowing for small fluctuations around an average in fluid velocity, chemical potentials and temperature. This leads to the appearance of specific two-body momentum correlations. Combining a blast-wave parametrization of the kinetic freeze-out surface with the thermal correlation functions of an ideal resonance gas, we perform an exploratory study of angular net-charge correlations induced by thermal fluctuations around vanishing chemical potential. We note a diffusion of the near-side peak around $Δy=Δϕ=0$ induced by variances of different chemical potentials, which could be investigated experimentally.
