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arXiv 1302.7312hep-th
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QCD通量管和Anomaly流入

QCD Flux Tubes and Anomaly Inflow

Chi Xiong

摘要:

我们将Callan-Harvey反常入流机制应用于QCD(色电)通量管、夸克(对)产生和手征磁效应的研究,使用规范势的Cho-Faddeev-Niemi分解的新变量。通过研究由QCD拉格朗日量导出的规范Nambu-Jona-Lasinio有效拉格朗日量,得到色电通量管的唯象描述。在量子水平上,QCD真空中的夸克凝聚可以在色电通量管中形成涡旋状结构。被困在涡旋中的夸克零模是手征的,并导致二维规范异常。为了消除它,需要有效的Chern-Simons耦合,因此拓扑电荷密度项自然出现。

英文摘要:

We apply the Callan-Harvey anomaly inflow mechanism to the study of QCD (chromoelectric) flux tubes, quark (pair)-creation and chiral magnetic effect, using new variables from the Cho-Faddeev-Niemi decomposition of the gauge potential. A phenomenological description of chromoelectric flux tubes is obtained by studying a gauged Nambu-Jona-Lasinio effective Lagrangian, derived from the original QCD Lagrangian. At the quantum level, quark condensates in the QCD vacuum may form a vortex-like structure in a chromoelectric flux tube. Quark zero modes trapped in the vortex are chiral and lead to a two-dimensional gauge anomaly. To cancel it an effective Chern-Simons coupling is needed and hence a topological charge density term naturally appears.

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