标题： 夸克在QGP热化时间尺度下的真空产生以及重离子碰撞中的奇异性增强 显示英文标题

标题： Vacuum creation of quarks at the time scale of QGP thermalization and strangeness enhancement in heavy-ion collisions

摘要： 在约1 fm/$c$的时间尺度上研究了快速变化的外部场中的真空部分子产生，这是一般用于夸克-胶子等离子体形成和热化的时间尺度。 为了描述系统的非平衡演化，采用了输运动力学方程。 结果表明，在与粒子反质量相当的时间尺度上，产生过程的动力学可以明显偏离基于均匀和恒定场的类施温格经典估计。 由非稳态色电场引起的一个效应是$s\bar{s}$夸克对产率的增强。 研究了该效应随场脉冲形状和持续时间的依赖关系，以及弦融合和夸克质量减小的影响。 显示英文摘要

摘要： The vacuum parton creation in quickly varying external fields is studied at the time scale of order 1 fm/$c$ typical for the quark-gluon plasma formation and thermalization. To describe the pre-equilibrium evolution of the system the transport kinetic equation is employed. It is shown that the dynamics of production process at times comparable with particle inverse masses can deviate considerably from that based on classical Schwinger-like estimates for homogeneous and constant fields. One of the effects caused by non-stationary chromoelectric fields is the enhancement of the yield of $s\bar{s}$ quark pairs. Dependence of this effect on the shape and duration of the field pulse is studied together with the influence of string fusion and reduction of quark masses.