Aad, G;
Abbott, B;
Abbott, DC;
Abed Abud, A;
Abeling, K;
Abhayasinghe, DK;
Abidi, SH;
... ATLAS Collaboration; + view all
(2021)
Longitudinal Flow Decorrelations in Xe+Xe Collisions at √sNN=5.44 TeV with the ATLAS Detector.
Physical Review Letters
, 126
(12)
, Article 122301. 10.1103/PhysRevLett.126.122301.
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Abstract
The first measurement of longitudinal decorrelations of harmonic flow amplitudes v n for n = 2 – 4 in Xe + Xe collisions at √ s N N = 5.44 TeV is obtained using 3 μ b − 1 of data with the ATLAS detector at the LHC. The decorrelation signal for v 3 and v 4 is found to be nearly independent of collision centrality and transverse momentum ( p T ) requirements on final-state particles, but for v 2 a strong centrality and p T dependence is seen. When compared with the results from Pb + Pb collisions at √ s N N = 5.02 TeV , the longitudinal decorrelation signal in midcentral Xe + Xe collisions is found to be larger for v 2 , but smaller for v 3 . Current hydrodynamic models reproduce the ratios of the v n measured in Xe + Xe collisions to those in Pb + Pb collisions but fail to describe the magnitudes and trends of the ratios of longitudinal flow decorrelations between Xe + Xe and Pb + Pb . The results on the system-size dependence provide new insights and an important lever arm to separate effects of the longitudinal structure of the initial state from other early and late time effects in heavy-ion collisions.
| Type: | Article |
|---|---|
| Title: | Longitudinal Flow Decorrelations in Xe+Xe Collisions at √sNN=5.44 TeV with the ATLAS Detector |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.126.122301 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.126.122301 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
| Keywords: | Collective flow, Particle correlations & fluctuations, Quark-gluon plasma, Relativistic heavy-ion collisions |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10125942 |
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