Anisotropic flow and flow fluctuations of identified hadrons in Pb-Pb collisions at root(NN)-N-s=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00368613" target="_blank" >RIV/68407700:21340/23:00368613 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP05(2023)243" target="_blank" >https://doi.org/10.1007/JHEP05(2023)243</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP05(2023)243" target="_blank" >10.1007/JHEP05(2023)243</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Anisotropic flow and flow fluctuations of identified hadrons in Pb-Pb collisions at root(NN)-N-s=5.02 TeV

Popis výsledku v původním jazyce

The first measurements of elliptic flow of pi(+/-), K-+/-, p+(p) over bar, K-S(0), Lambda + (Lambda) over bar, phi, Xi(-)+ Xi(+), and Omega(-) + (Omega) over bar (+) using multiparticle cumulants in Pb-Pb collisions at root(NN)-N-s = 5.02TeV are presented. Results obtained with two- ( v2{2}) and four-particle cumulants ( v(2){4}) are shown as a function of transverse momentum, pT, for various collision centrality intervals. Combining the data for both v(2){2} and v(2){4} also allows us to report the first measurements of the mean elliptic flow, elliptic flow fluctuations, and relative elliptic flow fluctuations for various hadron species. These observables probe the event-by-event eccentricity fluctuations in the initial state and the contributions from the dynamic evolution of the expanding quark-gluon plasma. The characteristic features observed in previous pT-differential anisotropic flow measurements for identified hadrons with two-particle correlations, namely the mass ordering at low pT and the approximate scaling with the number of constituent quarks at intermediate pT, are similarly present in the four-particle correlations and the combinations of v(2){2} and v(2){4}. In addition, a particle species dependence of flow fluctuations is observed that could indicate a significant contribution from final state hadronic interactions. The comparison between experimental measurements and CoLBT model calculations, which combine the various physics processes of hydrodynamics, quark coalescence, and jet fragmentation, illustrates their importance over a wide pT range.

Název v anglickém jazyce

Anisotropic flow and flow fluctuations of identified hadrons in Pb-Pb collisions at root(NN)-N-s=5.02 TeV

Popis výsledku anglicky

The first measurements of elliptic flow of pi(+/-), K-+/-, p+(p) over bar, K-S(0), Lambda + (Lambda) over bar, phi, Xi(-)+ Xi(+), and Omega(-) + (Omega) over bar (+) using multiparticle cumulants in Pb-Pb collisions at root(NN)-N-s = 5.02TeV are presented. Results obtained with two- ( v2{2}) and four-particle cumulants ( v(2){4}) are shown as a function of transverse momentum, pT, for various collision centrality intervals. Combining the data for both v(2){2} and v(2){4} also allows us to report the first measurements of the mean elliptic flow, elliptic flow fluctuations, and relative elliptic flow fluctuations for various hadron species. These observables probe the event-by-event eccentricity fluctuations in the initial state and the contributions from the dynamic evolution of the expanding quark-gluon plasma. The characteristic features observed in previous pT-differential anisotropic flow measurements for identified hadrons with two-particle correlations, namely the mass ordering at low pT and the approximate scaling with the number of constituent quarks at intermediate pT, are similarly present in the four-particle correlations and the combinations of v(2){2} and v(2){4}. In addition, a particle species dependence of flow fluctuations is observed that could indicate a significant contribution from final state hadronic interactions. The comparison between experimental measurements and CoLBT model calculations, which combine the various physics processes of hydrodynamics, quark coalescence, and jet fragmentation, illustrates their importance over a wide pT range.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2023

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

35

Strana od-do

—

Kód UT WoS článku

001022886700001

EID výsledku v databázi Scopus

2-s2.0-85160948065