Measurement of 1 νn coefficients and event plane correlations in 2.76 TeV Pb-Pb collisions with ATLAS

被引：1

作者：

Mohapatra, Soumya ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA

来源：

NUCLEAR PHYSICS A | 2013年 / 910卷

关键词：

Heavy ions; Collective flow; Two-particle correlations; Dipolar flow; Event plane correlations;

D O I：

10.1016/j.nuclphysa.2012.12.064

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Measurements of flow harmonics nu(1) - nu(6) are presented in a broad range of transverse momentum and centrality for root s(NN) = 2.76 TeV Pb-Pb collisions with the ATLAS experiment. The fourier coefficients of two-particle correlations are shown to factorize as products of the single particle nu(n) for n = 2 - 6. The factorization breaks for n = l due to effects of global momentum conservation. The dipolar nu(1), associated with the initial dipole asymmetry is extracted from the two-particle correlations via a two component fit that accounts for momentum conservation. The magnitude of the extracted dipolar nu(1), is comparable to nu(3). Measurements of correlations between harmonic planes of different orders, which give additional constraints on the initial geometry and expansion mechanism of the medium produced in the heavy ion collisions, are also presented.

引用

页码：75 / 82

页数：8

共 14 条

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