This paper describes the measurements of flow harmonics v2–v6 in 3 μb−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

Aad G., A.B. (2020). Measurement of the azimuthal anisotropy of charged-particle production in Xe + Xe collisions at √sNN = 5.44 TeV with the ATLAS detector. PHYSICAL REVIEW C, 101(2), 1-35 [10.1103/PhysRevC.101.024906].

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

Alberghi G. L.;Alfonsi F.;Bellagamba L.;Bindi M.;Boscherini D.;Cabras G.;Caforio D.;De Castro S.;Di Sipio R.;Fabbri F.;Fabbri L.;Franchini M.;Gabrielli A.;Giacobbe B.;Lasagni Manghi F.;MacChiolo A.;Massa L.;Monzani S.;Polini A.;Rinaldi L.;Romano M.;Sbarra C.;Sbrizzi A.;Semprini-Cesari N.;Sioli M.;Todome K.;Ucchielli G.;Valentinetti S.;Villa M.;Vittori C.;Vivarelli I.;Zoccoli A.;
2020

Abstract

This paper describes the measurements of flow harmonics v2–v6 in 3 μb−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
2020
Aad G., A.B. (2020). Measurement of the azimuthal anisotropy of charged-particle production in Xe + Xe collisions at √sNN = 5.44 TeV with the ATLAS detector. PHYSICAL REVIEW C, 101(2), 1-35 [10.1103/PhysRevC.101.024906].
Aad G., Abbott B., Abbott D.C., Abed Abud A., Abeling K., Abhayasinghe D.K., Abidi S.H., Abouzeid O.S., Abraham N.L., Abramowicz H., Abreu H., Abulait...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/784656
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