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arXiv 1012.2373hep-ph
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在$η$和$ϕ$上二维角关联中的最小偏置喷流与磁通管

Glasma flux tubes vs minimum-bias jets in 2D angular correlations on $η$ and $ϕ$

Thomas A. Trainor

摘要:

在相对论重离子对撞机(RHIC)上测量的重离子碰撞角关联包括一个同侧(SS)二维峰,该峰在更中心的\auau碰撞中在赝快度$η$上被强烈拉长。这个拉长的峰被称为“软脊”。SS峰值与外围碰撞和p-p碰撞中预期的喷流相关性一致。已经提出了一个饱和度尺度的论点来解释的起源拉长SS峰的相关性从径向流相互作用的磁通管。在这个分析中,我们审查的细节,提出的论点相比,微扰QCD预测的喷流产量和相关性。我们发现,该建议是不一致的测量光谱和相关的几个功能。

英文摘要:

Angular correlations measured in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) include a same-side (SS) 2D peak which is strongly elongated on pseudorapidity $η$ in more-central \auau collisions. The elongated peak has been referred to as a ``soft ridge.'' The SS peak is consistent with expected jet correlations in peripheral åand p-p collisions. A saturation-scale argument has been proposed to explain the origin of the elongated SS peak in terms of correlations from Glasma flux tubes interacting with radial flow. In this analysis we review the details of the proposed argument in comparison to perturbative QCD predictions of jet yields and correlations. We find that the proposal is inconsistent with several features of measured spectra and correlations.

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