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000250976 0247_ $$2doi$$a10.17182/HEPDATA.133026
000250976 037__ $$aGSI-2023-00177
000250976 041__ $$aEnglish
000250976 1001_ $$0P:(DE-HGF)0$$aALICE Collaboration$$b0$$eCorresponding author
000250976 245__ $$aCharacterizing the initial conditions of heavy-ion collisions at the LHC with mean transverse momentum and anisotropic flow correlations
000250976 260__ $$c2022
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000250976 500__ $$aJournal Article GSI record: GSI-2023-00116
000250976 520__ $$aCorrelations between mean transverse momentum $[p_{\rm T}]$ and anisotropic flow coefficients $v_{\rm 2}$ or $v_{\rm 3}$ are measured as a function of centrality in Pb--Pb and Xe--Xe collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV and 5.44 TeV, respectively, with ALICE. In addition, the recently proposed higher-order correlation between $[p_{\rm T}]$, $v_{\rm 2}$, and $v_{\rm 3}$ is measured for the first time, which shows an anticorrelation for the presented centrality ranges. These measurements are compared with hydrodynamic calculations using IP-Glasma and $\rm T_{R}ENTo$ initial-state shapes, the former based on the Color Glass Condensate effective theory with gluon saturation, and the latter a parameterized model with nucleons as the relevant degrees of freedom. The data are better described by the IP-Glasma rather than the $\rm T_{R}ENTo$ based calculations. In particular, Trajectum and JETSCAPE predictions, both based on the $\rm T_{R}ENTo$ initial state model but with different parameter settings, fail to describe the measurements. As the correlations between $[p_{\rm T}]$ and $v_{\rm n}$ are mainly driven by the correlations of the size and the shape of the system in the initial state, these new studies pave a novel way to characterize the initial state in relativistic heavy-ion collisions.
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000250976 773__ $$a10.17182/HEPDATA.133026
000250976 7870_ $$0GSI-2023-00116$$aAcharya, Shreyasi et.al.$$dAmsterdam : North-Holland Publ., 2022$$iRelatedTo$$rarXiv:2111.06106 ; CERN-EP-2021-232$$tCharacterizing the initial conditions of heavy-ion collisions at the LHC with mean transverse momentum and anisotropic flow correlations
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