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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00585196" target="_blank" >RIV/61389005:_____/24:00585196 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00585196 RIV/68407700:21340/24:00377079

Result on the web

<a href="https://doi.org/10.1016/j.physletb.2024.138477" target="_blank" >https://doi.org/10.1016/j.physletb.2024.138477</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.138477" target="_blank" >10.1016/j.physletb.2024.138477</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10304 - Nuclear physics

Project

<a href="/en/project/LM2023040" target="_blank" >LM2023040: Research infrastructure for experiments at CERN</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Volume of the periodical

850

Issue of the periodical within the volume

MAR

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

138477

UT code for WoS article

001186201000001

EID of the result in the Scopus database

2-s2.0-85184479787