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arXiv 1202.3696hep-thhep-phnucl-th
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强耦合各向异性等离子体中的拖曳力

Drag force in a strongly coupled anisotropic plasma

Mariano Chernicoff, Daniel Fernandez, David Mateos, Diego Trancanelli

摘要:

利用引力对偶理论计算了无限大质量夸克在各向异性、强耦合N=4等离子体中匀速传播时所受的曳力。我们发现,夸克后面的胶子云通常与夸克速度不一致,而夸克速度也与力不一致。阻力系数$μ$可以大于或小于相应的各向同性值,这取决于运动的速度和方向。在超相对论极限下,我们发现一般的$μ\propto p$。我们讨论的条件下,这种行为可能会扩展到更一般的情况下。

英文摘要:

We calculate the drag force experienced by an infinitely massive quark propagating at constant velocity through an anisotropic, strongly coupled N=4 plasma by means of its gravity dual. We find that the gluon cloud trailing behind the quark is generally misaligned with the quark velocity, and that the latter is also misaligned with the force. The drag coefficient $μ$ can be larger or smaller than the corresponding isotropic value depending on the velocity and the direction of motion. In the ultra-relativistic limit we find that generically $μ\propto p$. We discuss the conditions under which this behaviour may extend to more general situations.

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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