Heavy quarks in turbulent QCD plasmas
Heavy quarks in turbulent QCD plasmas
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DOI：
10.1140/epja/i2018-12478-5
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发表时间：
2017-06
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影响因子：
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通讯作者：
S. Mrówczyński
中科院分区：
文献类型：
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作者：
S. Mrówczyński
夸克-胶子等离子体是在极端相对论重离子碰撞的早期阶段产生的，预计最初将强烈填充色动力场。我们讨论了与能量密度相同的平衡等离子体相比，重夸克如何与这样的湍流等离子体相互作用的问题。为此，我们导出了嵌入轻夸克胶子等离子体中的重夸克福克-普朗克输运方程。我们首先讨论平衡等离子体，然后用同样的方法讨论湍流等离子体，其中重夸克不与等离子体成分相互作用，而是与长波经典场相互作用。我们首先考虑了各向同性湍流等离子体的三个示意图模型，然后考虑了色动力场仅沿束流方向的玻璃的简化模型。计算了一个测试重夸克的动量展宽和碰撞能量损失，并与相同能量密度的平衡等离子体的动量展宽和碰撞能量损失进行了比较。
The quark-gluon plasma, which is produced at an early stage of ultrarelativistic heavy-ion collisions, is expected to be initially strongly populated with chromodynamic fields. We address the question of how heavy quarks interact with such a turbulent plasma in comparison with an equilibrated one of the same energy density. For this purpose we derive a Fokker-Planck transport equation of heavy quarks embedded in a plasma of light quarks and gluons. We first discuss the equilibrium plasma and then the turbulent one applying the same approach, where the heavy quarks interact not with the plasma constituents but rather with the long wavelength classical fields. We first consider the three schematic models of isotropic trubulent plasma and then the simplified model of glasma with the chromodynamic fields only along the beam direction. The momentum broadening and collisional energy loss of a test heavy quark are computed and compared to those of the equilibrium plasma of the same energy density.