Measurement of the azimuthal anisotropy of charged-particle production in Xe plus Xe collisions at √SNN=5.44 TeV with the ATLAS detector



Aad, G, Abbott, B, Abbott, DC, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2882 more authors) (2020) Measurement of the azimuthal anisotropy of charged-particle production in Xe plus Xe collisions at √SNN=5.44 TeV with the ATLAS detector PHYSICAL REVIEW C, 101 (2). 024906-. ISSN 2469-9985, 2469-9993

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Abstract

This paper describes the measurements of flow harmonics v2-v6 in 3μb-1 of Xe+Xe collisions at sNN=5.44 TeV performed using the ATLAS detector at the Large Hadron Collider (LHC). Measurements of the centrality, multiplicity, and pT dependence of the vn 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 vn at high pT, especially in peripheral events. Comparisons of the measured vn with measurements in Pb+Pb collisions and p+Pb collisions at sNN=5.02 TeV are also presented. The vn 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 vn values in Xe+Xe collisions become smaller than those in Pb+Pb collisions. The vn in Xe+Xe and Pb+Pb collisions are also compared as a function of the mean number of participating nucleons, (Npart), and the measured charged-particle multiplicity in the detector. The v3 values in Xe+Xe and Pb+Pb collisions are observed to be similar at the same (Npart) or multiplicity, but the other harmonics are significantly different. The ratios of the measured vn in Xe+Xe and Pb+Pb collisions, as a function of centrality, are also compared to theoretical calculations.

Item Type: Article
Additional Information: 53 pages in total, author list starting page 37, 21 figures, 1 table, submitted to Phys. Rev. C. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2019-03/
Uncontrolled Keywords: nucl-ex, nucl-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 09 Mar 2020 09:21
Last Modified: 22 May 2026 17:20
DOI: 10.1103/PhysRevC.101.024906
Open Access URL: https://journals.aps.org/prc/abstract/10.1103/Phys...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3078165
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