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arXiv 1012.5431hep-thhep-phnucl-exnucl-th
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AdS/CFT强耦合下重离子碰撞的长程快度关联

Long-Range Rapidity Correlations in Heavy Ion Collisions at Strong Coupling from AdS/CFT

Hovhannes R. Grigoryan, Yuri V. Kovchegov

摘要:

利用AdS/CFT对应研究了强耦合下重离子碰撞中的两粒子关联。模拟碰撞重离子的冲击波的重力侧,我们观察到,在碰撞后的早期有长程快度相关存在于两点函数的胶球和能量动量张量运营商。我们估计快度相关性在以后的时间通过假设系统的演变是由理想的Bjorken流体力学,并发现在这种状态下的胶球相关性被抑制在大的快度间隔,这表明后期的介质动力学不能“洗”的远程快度相关性,在早期形成的。这些结果可能提供了一个洞察的“脊”的性质所观察到的重离子碰撞实验在RHIC和LHC,在质子-质子碰撞在LHC。

英文摘要:

We use AdS/CFT correspondence to study two-particle correlations in heavy ion collisions at strong coupling. Modeling the colliding heavy ions by shock waves on the gravity side, we observe that at early times after the collision there are long-range rapidity correlations present in the two-point functions for the glueball and the energy-momentum tensor operators. We estimate rapidity correlations at later times by assuming that the evolution of the system is governed by ideal Bjorken hydrodynamics, and find that glueball correlations in this state are suppressed at large rapidity intervals, suggesting that late-time medium dynamics can not "wash out" the long-range rapidity correlations that were formed at early times. These results may provide an insight on the nature of the "ridge" correlations observed in heavy ion collision experiments at RHIC and LHC, and in proton-proton collisions at LHC.

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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