The v1/33/v1/22 ratio in PbAu collisions at √sNN=17.3 GeV: a hint of a hydrodynamic behavior

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00600556" target="_blank" >RIV/61389005:_____/24:00600556 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-024-13416-y" target="_blank" >https://doi.org/10.1140/epjc/s10052-024-13416-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-024-13416-y" target="_blank" >10.1140/epjc/s10052-024-13416-y</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The v1/33/v1/22 ratio in PbAu collisions at √sNN=17.3 GeV: a hint of a hydrodynamic behavior

Popis výsledku v původním jazyce

The Fourier harmonics, v(2) and v(3) of negative pions are measured at center-of-mass energy per nucleon pair of sNNsNN= 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0-30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum pTpT from 0.05 GeV/cc to more than 2 GeV/cc. This is the first measurement of the v(3)(1/3)/v(2)(1/2) ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For pTpT above 0.5 GeV/cc, the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

Název v anglickém jazyce

The v1/33/v1/22 ratio in PbAu collisions at √sNN=17.3 GeV: a hint of a hydrodynamic behavior

Popis výsledku anglicky

The Fourier harmonics, v(2) and v(3) of negative pions are measured at center-of-mass energy per nucleon pair of sNNsNN= 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0-30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum pTpT from 0.05 GeV/cc to more than 2 GeV/cc. This is the first measurement of the v(3)(1/3)/v(2)(1/2) ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For pTpT above 0.5 GeV/cc, the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

84

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1090

Kód UT WoS článku

001339922600004

EID výsledku v databázi Scopus

2-s2.0-85207161581