Systematic study of flow vector fluctuations in root SNN=5.02 TeV Pb-Pb collisions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00377803" target="_blank" >RIV/68407700:21340/24:00377803 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.109.065202" target="_blank" >https://doi.org/10.1103/PhysRevC.109.065202</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.109.065202" target="_blank" >10.1103/PhysRevC.109.065202</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Systematic study of flow vector fluctuations in root SNN=5.02 TeV Pb-Pb collisions

Popis výsledku v původním jazyce

Measurements of the p(T)-dependent flow vector fluctuations in Pb-Pb collisions at root S-NN = 5.02 TeV using azimuthal correlations with the ALICE experiment at the Large Hadron Collider are presented. A four-particle correlation approach [ALICE Collaboration, Phys. Rev. C 107, L051901 (2023)] is used to quantify the effects of flow angle and magnitude fluctuations separately. This paper extends previous studies to additional centrality intervals and provides measurements of the p(T)-dependent flow vector fluctuations at root S-NN = 5.02 TeV with two-particle correlations. Significant p(T)-dependent fluctuations of the (V) over right arrow (2) flow vector in Pb-Pb collisions are found across different centrality ranges, with the largest fluctuations of up to similar to 15% being present in the 5% most central collisions. In parallel, no evidence of significant p(T)-dependent fluctuations of (V) over right arrow (3) or (V) over right arrow (4) is found. Additionally, evidence of flow angle and magnitude fluctuations is observed with more than 5 sigma significance in central collisions. These observations in Pb-Pb collisions indicate where the classical picture of hydrodynamic modeling with a common symmetry plane breaks down. This has implications for hard probes at high p(T), which might be biased by p(T)-dependent flow angle fluctuations of at least 23% in central collisions. Given the presented results, existing theoretical models should be reexamined to improve our understanding of initial conditions, quark-gluon plasma properties, and the dynamic evolution of the created system.

Název v anglickém jazyce

Systematic study of flow vector fluctuations in root SNN=5.02 TeV Pb-Pb collisions

Popis výsledku anglicky

Measurements of the p(T)-dependent flow vector fluctuations in Pb-Pb collisions at root S-NN = 5.02 TeV using azimuthal correlations with the ALICE experiment at the Large Hadron Collider are presented. A four-particle correlation approach [ALICE Collaboration, Phys. Rev. C 107, L051901 (2023)] is used to quantify the effects of flow angle and magnitude fluctuations separately. This paper extends previous studies to additional centrality intervals and provides measurements of the p(T)-dependent flow vector fluctuations at root S-NN = 5.02 TeV with two-particle correlations. Significant p(T)-dependent fluctuations of the (V) over right arrow (2) flow vector in Pb-Pb collisions are found across different centrality ranges, with the largest fluctuations of up to similar to 15% being present in the 5% most central collisions. In parallel, no evidence of significant p(T)-dependent fluctuations of (V) over right arrow (3) or (V) over right arrow (4) is found. Additionally, evidence of flow angle and magnitude fluctuations is observed with more than 5 sigma significance in central collisions. These observations in Pb-Pb collisions indicate where the classical picture of hydrodynamic modeling with a common symmetry plane breaks down. This has implications for hard probes at high p(T), which might be biased by p(T)-dependent flow angle fluctuations of at least 23% in central collisions. Given the presented results, existing theoretical models should be reexamined to improve our understanding of initial conditions, quark-gluon plasma properties, and the dynamic evolution of the created system.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LM2023040" target="_blank" >LM2023040: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

109

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

—

Kód UT WoS článku

001270476000001

EID výsledku v databázi Scopus

2-s2.0-85196412464