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首页> 外文期刊>Physical review, C >Measurement of the azimuthal anisotropy of charged-particle production in Xe plus Xe collisions at root S-NN=5.44 TeV with the ATLAS detector
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Measurement of the azimuthal anisotropy of charged-particle production in Xe plus Xe collisions at root S-NN=5.44 TeV with the ATLAS detector

机译：用ATLAS检测器在根S-NN = 5.44 TEV的XE加XE碰撞中的带电粒子产生方位调各向异性的测量

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摘要

This paper describes the measurements of flow harmonics v(2)-v(6) in 3 mu b(-1) of Xe Xe collisions at root S-NN = 5.44 TeV performed using the ATLAS detector at the Large Hadron Collider (LHC). Measurements of the centrality, multiplicity, and p(T) dependence of the v(n) obtained using two-particle correlations and the scalar product technique are presented. The measurements are also performed using a template-fit procedure, which was developed to remove nonflow correlations in small collision systems. This nonflow removal is shown to have a significant influence on the measured v(n) at high p(T), especially in peripheral events. Comparisons of the measured v(n) with measurements in Pb + Pb collisions and p + Pb collisions at root S-NN = 5.02 TeV are also presented. The v(n) values in Xe + Xe collisions are observed to be larger than those in Pb + Pb collisions for n = 2, 3, and 4 in the most central events. However, with decreasing centrality or increasing harmonic order n, the v(n) values in Xe + Xe collisions become smaller than those in Pb + Pb collisions. The v(n) in Xe + Xe and Pb + Pb collisions are also compared as a function of the mean number of participating nucleons, < N-part >, and the measured charged-particle multiplicity in the detector. The v(3) values in Xe + Xe and Pb + Pb collisions are observed to be similar at the same < N-part > or multiplicity, but the other harmonics are significantly different. The ratios of the measured v(n) in Xe + Xe and Pb + Pb collisions, as a function of centrality, are also compared to theoretical calculations.
机译：本文介绍了在Root S-NN = 5.44 Tev的XE XE碰撞中的3μB（-1）中的流动谐波V（2）-V（6）的测量值，在大的Hadron撞机（LHC）上执行了Root S-Nn = 5.44 Tev。 。呈现了使用双粒子相关和标量产品技术获得的V（n）的中心，多重和p（t）依赖性的测量。还使用模板配合程序进行测量，该程序是开发的，以去除小碰撞系统中的非流相关。该无流出去除显示在高p（t）的测量V（n）上对测量的V（n）具有显着影响，尤其是在外围事件中。还呈现了测量的V（n）的测量V（n）在Root s-nn = 5.02 tev中的Pb + Pb碰撞和P + Pb碰撞中的测量值。观察到XE + XE冲突中的V（n）值大于在最中心事件中为n = 2,3和4的Pb + Pb碰撞中的V（n）值。然而，随着谐波次碰撞中的谐波序列N的下降中心或增加谐波序列，XE + XE碰撞中的V（n）值变得小于PB + PB碰撞中的V（n）值。还将XE + XE和PB + PB碰撞中的V（n）作为参与核磁，和检测器中测量的带电粒子多重性的函数进行比较。观察到XE + XE和PB + PB碰撞中的V（3）值在相同的或多重性中类似，但其他谐波显着不同。还与理论计算相比，XE + XE和PB + PB碰撞中测量的V（n）的比率，作为中心性的函数。

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