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arXiv 1004.2769hep-ph
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手征磁效应的介电修正

Dielectric correction to the Chiral Magnetic Effect

Kenji Fukushima, Marco Ruggieri

摘要:

在磁场$B$和手征化学势$μ_5$的作用下,我们导出了电流密度$j_{em}$。结果表明,$j_{em}$不仅具有反常诱导项$\propto μ_5 B$(即手征磁效应),而且还具有由相互作用引起的非反常修正项,该修正项用磁化率表示.我们发现的校正特性依赖于夸克味的数量。数值估计的修正对重离子碰撞的影响很小,但可以通过格点量子色动力学模拟来检验。

英文摘要:

We derive an electric current density $j_{em}$ in the presence of a magnetic field $B$ and a chiral chemical potential $μ_5$. We show that $j_{em}$ has not only the anomaly-induced term $\propto μ_5 B$ (i.e. Chiral Magnetic Effect) but also a non-anomalous correction which comes from interaction effects and expressed in terms of the susceptibility. We find the correction characteristically dependent on the number of quark flavors. The numerically estimated correction turns out to be a minor effect on heavy-ion collisions but can be tested by the lattice QCD simulation.

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