论文标题
带电的亚原子漩涡中的磁场
Magnetic Field in the Charged Subatomic Swirl
论文作者
论文摘要
我们报告了带电流体系统中旋转和磁场之间的新型关系：由于与旋转电荷相关的电流，自然沿流体涡流方向存在磁场。使用流体涡流证明了这种一般连接。将这个想法应用于重离子碰撞，我们提出了一种新的机制，用于生成寿命相对较长的中等磁场。我们估计了在广泛的碰撞束能量中，在Au-au碰撞系统中，这个新磁场的大小。发现这样的磁场迅速增加向较低的束能量，并且可以构成大量实验观察到的Hyperons和Antyperons之间的全局极化差异。
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.
