Dataset

GSI-2024-00292

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV at the LHC

ALICE Collaboration (Corresponding author)

2023

Please use a persistent id in citations: doi:10.17182/HEPDATA.139721

Abstract: This 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.

Note: Journal Article GSI record: GSI-2024-00291

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Contributing Institute(s):

1. ALICE (ALI)
2. Detektorlabor (DTL)
3. IT (CIT)
4. ExtreMe Matter Institute, EMMI (EXM)
5. Collaboration CERN: ALICE (ALICE@CERN)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. HGS-HIRe - HGS-HIRe for FAIR (HGS-HIRe) (HGS-HIRe)
3. SUC-GSI-Heidelberg - Strategic university cooperation GSI-U Heidelberg (SUC-GSI-HE) (SUC-GSI-HE)
4. SUC-GSI-Frankfurt - Strategic university cooperation GSI-U Frankfurt/M (SUC-GSI-FR) (SUC-GSI-FR)
5. SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU Darmstadt (SUC-GSI-DA) (SUC-GSI-DA)

Experiment(s):

1. LHC: ALICE

Appears in the scientific report 2023

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Acharya, S. ; Adamova, D. ; Adler, A. ; et al
Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV at the CERN Large Hadron Collider
Physical review / C 107(5), L051901 (2023) [10.1103/PhysRevC.107.L051901]2023   Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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