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arXiv 0905.2930hep-phnucl-th
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辐射喷流能量损失中的记忆效应

Memory effects in radiative jet energy loss

Frank Michler, Björn Schenke, Carsten Greiner

摘要:

在重离子碰撞中,产生的夸克-胶子等离子体形成快速演化的背景,导致高动量部分子穿越介质的依赖于时间的辐射行为。我们使用Schwinger Keldysh形式主义来描述射流演化为一个非平衡过程,包括Landau-Pomeranschuk-Migdal效应。集中在光子发射,我们的结果与准静态计算的比较显示出很好的一致性,导致的结论是,辐射行为几乎瞬间跟随介质中的变化。

英文摘要:

In heavy-ion collisions the created quark-gluon plasma forms a quickly evolving background, leading to a time dependent radiative behavior of high momentum partons traversing the medium. We use the Schwinger Keldysh formalism to describe the jet evolution as a non-equilibrium process including the Landau-Pomeranschuk-Migdal effect. Concentrating on photon emission, a comparison of our results to a quasistatic calculation shows good agreement, leading to the conclusion that the radiative behavior follows the changes in the medium almost instantaneously.

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