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arXiv 1012.6026hep-thhep-phnucl-th
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手征磁波

Chiral Magnetic Wave

Dmitri E. Kharzeev, Ho-Ung Yee

摘要:

本文研究了外磁场中含有带电手征费米子的相对论等离子体,例如相对论重离子碰撞中产生的手征夸克-胶子等离子体离子体。我们发现,三角形异常意味着存在一种新型的集体无隙激发在这个系统中,源于密度波的电荷和手征电荷之间的耦合,我们称之为“手征磁波”(CMW)。CMW甚至存在于中性等离子体中,即在没有轴向和矢量化学势的情况下。我们用三种不同的方法证明了CMW的存在并研究了它的性质:i)相对论磁流体力学; ii)降维到$(1+1)$ Sine-Gordon模型,适用于强磁场; iii)全息QCD(Sakai-Sugimoto模型),适用于强耦合。我们还简要讨论了CMW对重离子碰撞的唯象意义。

英文摘要:

We consider a relativistic plasma containing charged chiral fermions in an external magnetic field, e.g a chirally symmetric quark-gluon plasma created in relativistic heavy ion collisions. We show that triangle anomalies imply the existence of a new type of collective gapless excitation in this system that stems from the coupling between the density waves of the electric and chiral charges; we call it "the Chiral Magnetic Wave" (CMW). The CMW exists even in a neutral plasma, i.e. in the absence of the axial and vector chemical potentials. We demonstrate the existence of CMW and study its properties using three different approaches: i) relativistic magnetohydrodynamics; ii) dimensional reduction to $(1+1)$ Sine-Gordon model, appropriate in a strong magnetic field; and iii) holographic QCD (Sakai-Sugimoto model), appropriate at strong coupling. We also briefly discuss the phenomenological implications of the CMW for heavy ion collisions.

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。

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