2017/09/30 by ATLAS Collaboration, M. Aaboud, G. Aad +98 · 1 citation
Physics and Astronomy · #Atlas (anatomy) #Atlas detector #Detector #Geology #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #nucl-ex
paper · pdf · doi:10.1140/epjc/s10052-018-5605-7
published as Eur. Phys. J. C 76 (2018) 142 · 27 pages plus author list + cover pages (44 pages total), 22 figures, 5 tables, submitted to Eur. Phys. J. C., All figures including auxiliary figures can be found at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2016-04/
openalex created_date 2017/09/15 · openalex publication_date 2018/02/01 · arxiv created 2018/02/20 · arxiv updated 2018/02/21 · openalex updated_date 2026/08/06
Measurements of longitudinal flow correlations are presented for charged particles in the pseudorapidity range || < 2.4 using 7 b -1 and 470 b -1 of Pb+Pb collisions at s NN = 2.76 and 5.02 TeV, respectively, recorded by the ATLAS detector at the LHC. It is found that the correlation between the harmonic flow coefficients v n measured in two separated intervals does not factorise into the product of single-particle coefficients, and this breaking of factorisation, or flow decorrelation, increases linearly with the separation between the intervals. The flow decorrelation is stronger at 2.76 TeV than at 5.02 TeV. Higher-order moments of the correlations are also measured, and the corresponding linear coefficients for the kth-moment of the v n are found to be proportional to k for v 3 , but not for v 2 . The decorrelation effect is separated into contributions from the magnitude of v n and the event-plane orientation, each as a function of . These two contributions are found to be comparable. The longitudinal flow correlations are also measured between v n of different order in n. The decorrelations of v 2 and v 3 are found to be independent of each other, while the decorrelations of v 4 and v 5 are found to be driven by the nonlinear contribution from v 2 2 and v 2 v 3 , respectively.