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000348456 0247_ $$2doi$$a10.17182/HEPDATA.139721
000348456 037__ $$aGSI-2024-00292
000348456 041__ $$aEnglish
000348456 1001_ $$0P:(DE-HGF)0$$aALICE Collaboration$$b0$$eCorresponding author
000348456 245__ $$aObservation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV at the LHC
000348456 260__ $$c2023
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000348456 500__ $$aJournal Article GSI record: GSI-2024-00291
000348456 520__ $$aThis Letter reports on the first measurements of transverse momentum dependent flow angle $\Psi_{n}$ and flow magnitude $v_{n}$ fluctuations, determined using new four-particle correlators. The measurements are performed for various centralities in Pb-–Pb collisions at a centre of mass energy of $\sqrt{s_{\rm NN}} = 5.02{\rm\ TeV}$ with ALICE at the LHC. Both flow angle and flow magnitude fluctuations are observed in the presented centrality ranges and are strongest in the most central collisions and for a transverse momentum $p_{\rm T} > 2{\rm\ GeV}/c$. Comparison with theoretical models, including iEBE-VISHNU, MUSIC, and AMPT, show that the measurements bring novel insights into the fluctuating initial conditions that are not well known. In addition, these new results exhibit unique sensitivities to the specific shear viscosity, $\eta/s$, of the quark–gluon plasma (QGP) and to the initial state of the heavy-ion collisions. As such fluctuations are getting stronger with increasing $p_{\rm T}$, a re-examination of existing models is needed to have a more precise and unbiased extraction of properties of the QGP.
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000348456 773__ $$a10.17182/HEPDATA.139721
000348456 7870_ $$0GSI-2024-00291$$aAcharya, Shreyasi et.al.$$dWoodbury, NY : Inst., 2023$$iRelatedTo$$rarXiv:2206.04574 ; CERN-EP-2022-121$$tObservation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV at the CERN Large Hadron Collider
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