arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1201.0422hep-phhep-latnucl-th
收藏

轴矢量相互作用手征磁效应的修正

Correction to the Chiral Magnetic Effect from axial-vector interaction

Zhao Zhang

摘要:

最近的有限轴向化学势下的晶格计算表明,与标准解析公式相比,手征磁效应(CME)的感应电流密度受到一定程度的抑制。在NJL型QCD模型中,我们证明了当考虑吸引轴矢量相互作用时,这种抑制是一个自然的结果。我们指出由于手征性密度-密度关联的存在,晶格结果不需要与解析公式定量一致。我们还研究了瞬子分子对CME的非微扰效应。由于非常规的排斥性轴矢量相互作用的诱导,CME将显着增强的瞬子-反瞬子配对。这样的预测需要通过更改进的晶格模拟来测试。我们进一步证明了轴矢量相互作用在$T-μ_A$相图中起着重要的作用。

英文摘要:

The recent lattice calculation at finite axial chemical potential suggests that the induced current density of the chiral magnetic effect (CME) is somehow suppressed comparing with the standard analytical formula. We show in a NJL-type model of QCD that such a suppression is a natural result when considering the influence of the attractive axial-vector interaction. We point out that the lattice result doesn't need to be quantitatively consistent with the analytical formula due to the chirality density-density correlation. We also investigate the nonperturbative effect of instanton molecules on the CME. Since an unconventional repulsive axial-vector interaction is induced, the CME will be enhanced significantly by the instanton-anti-instanton pairings. Such a prediction needs to be tested by more improved lattice simulations. We further demonstrate that the axial-vector interaction plays an important role on the $T-μ_A$ phase diagram.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑