Bjorken flow, plasma instabilities, and thermalization
Bjorken flow, plasma instabilities, and thermalization
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DOI：
10.1007/jhep11(2011)120
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发表时间：
2011-08
影响因子：
5.4
通讯作者：
A. Kurkela;G. Moore
中科院分区：
文献类型：
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作者：
A. Kurkela;G. Moore
在渐近高能下，重离子碰撞中的热化过程可以用弱耦合QCD来描述。我们提出了一个完整的治疗热化如何进行，在参数弱耦合水平。我们发现，等离子体不稳定性占主导地位的动力学，从碰撞后立即直到等离子体变得接近平衡。最初，它们使系统接近各向同性，但比约肯膨胀和稀释度的增加使系统再次变得更加各向异性。有时，动力学成为一个近热浴主导;有时，浴来主导能量密度，完成热化。在这段时间之后，有一个近各向同性和热夸克胶子等离子体。
At asymptotically high energies, thermalization in heavy ion collisions can be described via weak-coupling QCD. We present a complete treatment of how thermalization proceeds, at the parametric weak-coupling level. We show that plasma instabilities dominate the dynamics, from immediately after the collision until well after the plasma becomes nearly in equilibrium. Initially they drive the system close to isotropy, but Bjorken expansion and increasing diluteness makes the system again become more anisotropic. At timethe dynamics become dominated by a nearly-thermal bath; and at timethe bath comes to dominate the energy density, completing thermalization. After this time there is a nearly isotropic and thermal Quark-Gluon Plasma.