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Article
Report number arXiv:2102.12180 ; CERN-EP-2021-031
Title Measurements of mixed harmonic cumulants in Pb-Pb collisions at sNN=5.02sNN=5.02 TeV
Author(s) ALICE Collaboration  Εμφάνιση και των 996 συγγραφέων
Corporate Author(s) The ALICE collaboration
Publication 2021-07-10
Imprint 18 Feb 2021
Number of pages 23
Note 23 pages, 7 captioned figures, authors from page 18, published version, figures at http://alice-publications.web.cern.ch/node/6815
In: Phys. Lett. B 818 (2021) 136354
DOI 10.1016/j.physletb.2021.136354 (publication)
Subject category hep-ex ; Particle Physics - Experiment ; nucl-ex ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Free keywords relativistic heavy ion physics ; quark gluon plasma ; particle correlations and fluctuations ; collective flow ; experimental results
Abstract Correlations between moments of different flow coefficients are measured in Pb--Pb collisions at sNN=5.02sNN=5.02 TeV recorded with the ALICE detector. These new measurements are based on multiparticle mixed harmonic cumulants calculated using charged particles in the pseudorapidity region |η|<0.8|η|<0.8 with the transverse momentum range 0.2<pT<5.00.2<pT<5.0 GeV/cc. The centrality dependence of correlations between two flow coefficients as well as the correlations between three flow coefficients, both in terms of their second moments, are shown. In addition, a collection of mixed harmonic cumulants involving higher moments of v2v2 and v3v3 is measured for the first time, where the characteristic signature of negative, positive and negative signs of four-, six- and eight-particle cumulants are observed, respectively. The measurements are compared to the hydrodynamic calculations using iEBE-VISHNU with AMPT and TRENTo initial conditions. It is shown that the measurements carried out using the LHC Run 2 data in 2015 have the precision to explore the details of initial-state fluctuations and probe the nonlinear hydrodynamic response of v2v2 and v3v3 to their corresponding initial anisotropy coefficients ε2ε2 and ε3ε3. These new studies on correlations between three flow coefficients as well as correlations between higher moments of two different flow coefficients will pave the way to tighten constraints on initial-state models and help to extract precise information on the dynamic evolution of the hot and dense matter created in heavy-ion collisions at the LHC.
Copyright/License publication: © 2021-2025 CERN (License: CC-BY-4.0)
preprint: © 2021-2025 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: yvonne.chiara.pachmayer@cern.ch


 Δημιουργία εγγραφής 2021-02-18, τελευταία τροποποίηση 2025-01-06


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