带电亚原子漩涡中的自旋流体动力学产生

Spin Hydrodynamic Generation in the Charged Subatomic Swirl.

作者信息

Guo Xingyu, Liao Jinfeng, Wang Enke

机构信息

Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou, 510006, China.

Physics Department and Center for Exploration of Energy and Matter, Indiana University, 2401 N Milo B. Sampson Lane, Bloomington, IN, 47408, USA.

出版信息

Sci Rep. 2020 Feb 10;10(1):2196. doi: 10.1038/s41598-020-59129-6.

DOI:10.1038/s41598-020-59129-6

PMID:32041999

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7010749/

Abstract

Recently there have been significant interests in the spin hydrodynamic generation phenomenon from multiple disciplines of physics. Such phenomenon arises from global polarization effect of microscopic spin by macroscopic fluid rotation and is expected to occur in the hot quark-gluon fluid (the "subatomic swirl") created in relativistic nuclear collisions. This was indeed discovered in experiments which however revealed an intriguing puzzle: a polarization difference between particles and anti-particles. We suggest a novel application of a general connection between rotation and magnetic field: a magnetic field naturally arises along the fluid vorticity in the charged subatomic swirl. We establish this mechanism as a new way for generating long-lived in-medium magnetic field in heavy ion collisions. Due to its novel feature, this new magnetic field provides a nontrivial explanation to the puzzling observation of a difference in spin hydrodynamic generation for particles and anti-particles in heavy ion collisions.

摘要

最近，来自多个物理学领域的研究对自旋流体动力学产生现象产生了浓厚兴趣。这种现象源于宏观流体旋转对微观自旋的全局极化效应，预计会出现在相对论性核碰撞中产生的热夸克-胶子流体（“亚原子漩涡”）中。这一现象确实在实验中被发现，然而实验揭示了一个有趣的谜题：粒子与反粒子之间的极化差异。我们提出了旋转与磁场之间一般联系的一种新颖应用：在带电亚原子漩涡中，磁场会自然地沿着流体涡度产生。我们将这一机制确立为在重离子碰撞中产生长寿命介质内磁场的一种新方式。由于其新颖特性，这种新磁场为重离子碰撞中粒子和反粒子在自旋流体动力学产生方面令人困惑的差异观测提供了一个非平凡的解释。