Pseudorapidity dependence of anisotropic flow and its decorrelations using long-range multiparticle correlations in Pb-Pb and Xe-Xe collisions

Acharya, S.; Adamová, Dagmar; Adler, A.; Aglieri Rinella, G.; Bielčík, J.; Bielčíková, Jana; Broz, M.; Contreras, J. G.; Filová, V.; Grecká, Ekaterina; Grund, D.; Herman, T.; Isakov, Artem; Khuntia, A.; Kotliarov, Artem; Krupová, D. M.; Křížek, Filip; Kushpil, Svetlana; Šafařík, K.; Torres, S. R.; Závada, Petr

doi:https://dx.doi.org/10.1016/j.physletb.2024.138477

Number of the records: 1

Pseudorapidity dependence of anisotropic flow and its decorrelations using long-range multiparticle correlations in Pb-Pb and Xe-Xe collisions

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SYSNO ASEP	0585196
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Pseudorapidity dependence of anisotropic flow and its decorrelations using long-range multiparticle correlations in Pb-Pb and Xe-Xe collisions
Author(s)	Acharya, S. (IN) Adamová, Dagmar (UJF-V)_{RID, ORCID, SAI} Adler, A. (DE) Aglieri Rinella, G. (CH) Bielčík, J. (CZ) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Broz, M. (CZ) Contreras, J. G. (CZ) Filová, V. (CZ) Grecká, Ekaterina (UJF-V)_ORCID Grund, D. (CZ) Herman, T. (CZ) Isakov, Artem (UJF-V)_{ORCID, SAI} Khuntia, A. (CZ) Kotliarov, Artem (UJF-V)_{ORCID, SAI} Krupová, D. M. (CZ) Křížek, Filip (UJF-V)_{RID, ORCID, SAI} Kushpil, Svetlana (UJF-V)_{RID, ORCID, SAI} Šafařík, K. (CZ) Torres, S. R. (CZ) Závada, Petr (FZU-D)_{RID, ORCID}
Number of authors	1055
Article number	138477
Source Title	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 850, MAR (2024)
Number of pages	17 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	ALICE collaboration ; heavy ion collisions
OECD category	Nuclear physics
Research Infrastructure	CERN-CZ III - 90240 - Fyzikální ústav AV ČR, v. v. i.
Method of publishing	Open access
Institutional support	FZU-D - RVO:68378271 ; UJF-V - RVO:61389005
UT WOS	001186201000001
EID SCOPUS	85184479787
DOI	10.1016/j.physletb.2024.138477
Annotation	he pseudorapidity dependence of elliptic (nu(2)), triangular (nu(3)), and quadrangular (nu(4)) flow coefficients of charged particles measured in Pb-Pb collisions at a centre-of-mass energy per nucleon pair of root s(NN) = 5.02 TeV and in Xe-Xe collisions at root s(NN) = 5.44 TeV with ALICE at the LHC are presented. The measurements are performed in the pseudorapidity range -3.5 < eta < 5 for various centrality intervals using two- and multi-particle cumulants with the subevent method. The flow probability density function (p.d.f.) is studied with the ratio of flow coefficient nu(2) calculated with four- and two-particle cumulant, and suggests that the variance of flow p.d.f. is independent of pseudorapidity. The decorrelation of the flow vector in the longitudinal direction is probed using two-particle correlations. The results measured with respect to different reference regions in pseudorapidity exhibit differences, argued to be a result of saturating decorrelation effect above a certain pseudorapidity separation, in contrast to previous publications which assign this observation to non-flow effects. The results are compared to 3 + 1 dimensional hydrodynamic and the AMPT transport model calculations. Neither of the models is able to simultaneously describe the pseudorapidity dependence of measurements of anisotropic flow and its fluctuations. The results presented in this work highlight shortcomings in our current understanding of initial conditions and subsequent system expansion in the longitudinal direction. Therefore, they provide input for its improvement.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2025
Electronic address	https://doi.org/10.1016/j.physletb.2024.138477

Number of the records: 1