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arXiv 2101.02579nucl-exhep-ex
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$\sqrt{s_{_{\rm NN}}}=2.76$ TeV上Pb-Pb碰撞中不同流幅值的多谐关联

Multi-harmonic correlations of different flow amplitudes in Pb-Pb collisions at $\sqrt{s_{_{\rm NN}}}=2.76$ TeV

ALICE Collaboration

摘要:

本文首次用高阶对称累积量测量了铅-铅碰撞中三个流幅值之间的事件-事件关联。我们发现,不同的三次谐波的相关性发展过程中的集体演化的介质,相比,存在于初始状态的相关性。这些新的结果不能解释在以前的低阶流量测量,因为从两个谐波相关的贡献被明确删除在新的观测。通过与蒙特卡罗模拟的比较,为重离子碰撞中产生的核物质的初始条件和系统性质提供了新的独立约束。

英文摘要:

The event-by-event correlations between three flow amplitudes are measured for the first time in Pb--Pb collisions, using higher-order Symmetric Cumulants. We find that different three-harmonic correlations develop during the collective evolution of the medium, when compared with correlations that exist in the initial state. These new results cannot be interpreted in terms of previous lower-order flow measurements, since contributions from two-harmonic correlations are explicitly removed in the new observables. Comparison with Monte Carlo simulations provides new and independent constraints for the initial conditions and system properties of nuclear matter created in heavy-ion collisions.

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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