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arXiv 1207.0900nucl-ex
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$\sqrt{s_{\rm NN}}= 2.76$ TeV上Pb-Pb碰撞中相对于反应平面的电荷分离

Charge separation relative to the reaction plane in Pb-Pb collisions at $\sqrt{s_{\rm NN}}= 2.76$ TeV

ALICE Collaboration

摘要:

本文报道了在LHC上用ALICE探测器测量$\sqrt{s_{\rm NN}} = 2.76$ TeV的Pb-Pb碰撞的电荷依赖方位角关联。在赝快度范围$|η| < 0.8$内,两粒子和三粒子的与电荷相关的方位角关联被描述为碰撞中心性、赝快度中的粒子分离和横向动量的函数。一个明确的信号与电荷相关的分离相对于反应平面兼容的观察,这表明很少或没有碰撞能量的依赖性相比,在RHIC能量的测量。这为理解在RHIC和LHC能量下观察到的电荷依赖方位角关联的性质提供了新的见解。

英文摘要:

Measurements of charge dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV. Two- and three-particle charge-dependent azimuthal correlations in the pseudo-rapidity range $|η| < 0.8$ are presented as a function of the collision centrality, particle separation in pseudo-rapidity, and transverse momentum. A clear signal compatible with a charge-dependent separation relative to the reaction plane is observed, which shows little or no collision energy dependence when compared to measurements at RHIC energies. This provides a new insight for understanding the nature of the charge dependent azimuthal correlations observed at RHIC and LHC energies.

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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