论文标题
Hyperon-相对论重型离子碰撞中的Arti-Hyperon极化不对称性，作为手性和螺旋涡流效应之间的相互作用
Hyperon--anti-hyperon polarization asymmetry in relativistic heavy-ion collisions as an interplay between chiral and helical vortical effects
论文作者
论文摘要
我们认为，与非中性相对论重型离子碰撞中超子的极化相比，抗杂种的自旋极化的增强是由于手性和螺旋涡度效应之间的相互作用而产生的。手性涡旋效应沿涡旋轴产生夸克的轴向电流，而最近发现的螺旋涡度效应会产生螺旋流动 - 沿相同轴的夸克极化向量的投影 - 夸克极化向量的投影。对于无质量费米子，螺旋电荷对应于颗粒和抗粒子对轴向电荷的贡献的差异。假设光夸克的自旋通过向量kaon状态转移到奇怪的夸克（“自旋矢量优势”），我们能够描述由星体获得的（反）超子自旋极化的比率，而无需拟合参数。我们还认为，螺旋涡度效应主要在手性涡旋效应和电流产生中的手性磁效应中占主导地位。
We argue that the enhancement in the spin polarization of anti-hyperons compared to the polarization of the hyperons in noncentral relativistic heavy-ion collisions arises as a result of an interplay between the chiral and helical vortical effects. The chiral vortical effect generates the axial current of quarks along the vorticity axis while the recently found helical vortical effect generates the helicity flow -- the projection of the quark's polarization vector onto its momentum -- along the same axis. For massless fermions, the helical charge corresponds to a difference in the contributions of particles and anti-particles to the axial charge. Assuming that the spin of light quarks transfers to the strange quarks via the vector kaon states ("the spin-vector dominance"), we are able to describe the ratio of the (anti)hyperon spin polarizations, obtained by the STAR group, without fitting parameters. We also argue that the helical vortical effect dominates over the chiral vortical effect and the chiral magnetic effect in the generation of the electric current.
