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arXiv 1503.07425nucl-thhep-phnucl-ex
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相对论性重离子碰撞中赝快度流关联的流体动力学模拟和力矩效应

Hydrodynamic modeling of pseudorapidity flow correlations in relativistic heavy-ion collisions and the torque effect

Piotr Bozek, Wojciech Broniowski, Adam Olszewski

摘要:

我们分析了在3+1维粘性流体动力学与Glauber模型的初始条件下,在不同的伪快度区间内事件平面角之间的相关性。如前所述,在最早阶段的粒子产生机制的波动,以及不对称的发射轮廓的赝快度从向前和向后去的受伤的核子,导致扭矩效应,即,事件平面角的去相关在遥远的赝快度箱。我们使用关联函数的两个或三个bin测量来量化效果,后者与CMS合作的最新数据进行比较。我们发现一个相当大的扭矩效应,在RHIC的幅度大于在LHC。

英文摘要:

We analyze correlations between the event-plane angles in different intervals of pseudorapidity within the 3+1-dimensional viscous hydrodynamics with the Glauber-model initial conditions. As predicted earlier, the fluctuations in the particle production mechanism in the earliest stage, together with asymmetry of the emission profiles in pseudorapidity from the forward- and backward going wounded nucleons, lead to the torque effect, namely, decorrelation of the event-plane angles in distant pseudorapidity bins. We use two- or three-bin measures of correlation functions to quantify the effect, with the latter compared to the recent data from the CMS collaboration. We find a sizable torque effect, with magnitude larger at RHIC than at the 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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