论文标题
QCD中的张量超电流
Tensor supercurrent in QCD
论文作者
论文摘要
一个外部的阿贝尔磁场在QCD真空中激发了张量的超电流，代表手性冷凝物的张量极化。在存在异常的情况下，可以从手性拉格朗日推导出这种张量超电流。在有限的化学势下，旋转系统中出现了类似的张量超电流。我们讨论了这种超电流的微观起源，并认为它筛选了QCD真空中的Instanton-anti-instanton $ i \ bar {i} $分子，类似于超管制器中的矢量超电流筛选abrikosov涡流。讨论了张量超电流的许多可能的实验表现：{\ it I}）在重离子碰撞中轴向矢量和载体中膜的旋转对齐； {\ it II}）核子的张量电荷； {\ it III}）在极化核子中夸克分布的横向。
An external Abelian magnetic field excites in the QCD vacuum a tensor supercurrent that represents the tensor polarization of the chiral condensate. This tensor supercurrent can be deduced from the chiral lagrangian in the presence of anomalies; a similar tensor supercurrent emerges in rotating systems at finite chemical potential. We discuss the microscopic origin of this supercurrent and argue that it screens the instanton--anti-instanton $I\bar{I}$ molecules in the QCD vacuum, similarly to the vector supercurrent screening Abrikosov vortices in a superconductor. A number of possible experimental manifestations of the tensor supercurrent are discussed: {\it i}) spin alignment of axial-vector and vector mesons in heavy ion collisions; {\it ii}) tensor charge of the nucleon; {\it iii}) transversity of quark distributions in polarized nucleons.
