论文标题
关于未平衡系统中偶数和奇数各向异性流的谐波之间的差异
On differences between even and odd anisotropic-flow harmonics in non-equilibrated systems
论文作者
论文摘要
为了评估如何在平衡的系统中创建各向异性横向流量，我们比较了几个响应状态中的几种动力学理论模型。我们比较了三种类型的传输模拟的流量谐波$ v_n $，其中$ 2 \至2 $或$ 2 \ to $ 2 \ to 0 $碰撞核，在前一种情况下，允许粒子分解或不进行几次分解，并且从分析计算中忽略了Boltzmann方程的增益项。我们发现，在所有方法中，均匀的流量谐波都是相似的，而奇数均匀的谐波却有很大的不同。这表明，尽管即使$ v_n $谐波在很大程度上也可能是由于颗粒的各向异性逃逸概率引起的，但这并不是奇数$ v_n $系数的主要机制。
To assess how anisotropic transverse flow is created in a system out of equilibrium, we compare several kinetic-theoretical models in the few-rescatterings regime. We compare the flow harmonics $v_n$ from three types of transport simulations, with either $2\to 2$ or $2\to 0$ collision kernels and in the former case allowing the particles to rescatter several times or not, and from analytical calculations neglecting the gain term of the Boltzmann equation. We find that the even flow harmonics are similar in all approaches, while the odd ones differ significantly. This suggests that while even $v_n$ harmonics may to a large extent be due to the anisotropic escape probability of particles, this is not the predominant mechanism underlying the odd $v_n$ coefficients.
