Measurements of mixed harmonic cumulants in Pb-Pb collisions at √<i>s</i><sub>NN</sub>=5.02 TeV



Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU
et al (show 979 more authors) (2021) Measurements of mixed harmonic cumulants in Pb-Pb collisions at √<i>s</i><sub>NN</sub>=5.02 TeV. PHYSICS LETTERS B, 818. p. 136354. ISSN 0370-2693, 1873-2445

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Abstract

Correlations between moments of different flow coefficients are measured in Pb–Pb collisions at s<inf>NN</inf>=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 with the transverse momentum range 0.2<p<inf>T</inf><5.0 GeV/c. 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 v<inf>2</inf> and v<inf>3</inf> 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 v<inf>2</inf> and v<inf>3</inf> to their corresponding initial anisotropy coefficients ε<inf>2</inf> and ε<inf>3</inf>. 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.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 Dec 2021 13:41
Last Modified: 12 Jun 2025 02:38
DOI: 10.1016/j.physletb.2021.136354
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3145498