荷电亚原子涡旋中的磁场
Magnetic Field in the Charged Subatomic Swirl
摘要：
我们报道了带电流体系统中旋转和磁场之间的一种新关系：由于与旋转电荷相关的电流，沿流体涡旋方向自然存在一个磁场。这种普遍的联系是证明使用流体涡流。将这一思想应用到重离子碰撞中，我们提出了一种新的产生具有相对较长寿命的介质内磁场的机制。我们估计这个新的磁场的大小在Au-Au碰撞系统跨越一个宽跨度的碰撞束能量。这样的磁场被发现迅速增加，向较低的束流能量，并可以解释大量的实验观察到的超子和反超子之间的全球极化差异。
英文摘要：
We report a novel relation between rotation and magnetic field in a charged fluid system: there is naturally a magnetic field along the direction of fluid vorticity due to the currents associated with the swirling charges. This general connection is demonstrated using a fluid vortex. Applying the idea to heavy ion collisions we propose a new mechanism for generating in-medium magnetic field with a relatively long lifetime. We estimate the magnitude of this new magnetic field in the Au-Au colliding systems across a wide span of collisional beam energy. Such a magnetic field is found to increase rapidly toward lower beam energy and could account for a significant amount of the experimentally observed global polarization difference between hyperons and anti-hyperons.
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