论文标题
高能量重离子碰撞中的局部平衡和lambda极化
Local equilibrium and Lambda polarization in high energy heavy ion collisions
论文作者
论文摘要
$λ$ Hyperon的极化已成为对相对论重型离子碰撞中产生的夸克 - 格鲁隆等离子体的重要探测。最近，已经发现极化从与四温载体的对称衍生物成正比的局部平衡项获得了重大贡献，即热剪切张量。我们表明，在非常高的能量下，只要强调超声表面是等温的，就可以恢复实验测量和流体动力模型的预测之间的一致性。我们回顾了这个新术语的理论推导，讨论RHIC和LHC Energies的数值计算，并将其与实验数据进行比较。我们还介绍了向下校正的效果。
The polarization of the $Λ$ hyperon has become an important probe of the Quark-Gluon Plasma produced in relativistic heavy-ion collisions. Recently, it has been found that polarization receives a substantial contribution from a local equilibrium term proportional to the symmetric derivative of the four-temperature vector, the thermal shear tensor. We show that, at very high energies, this term can restore the agreement between the experimental measurements and the predictions of the hydrodynamic model, provided that the hadronization hypersurface is isothermal. We review the theoretical derivation of this new term, discuss numerical computations at RHIC and LHC energies, and compare them with the experimental data. We also present the effect of feed-down corrections.
