Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at root sNN=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00380180" target="_blank" >RIV/68407700:21340/24:00380180 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP08(2024)234" target="_blank" >https://doi.org/10.1007/JHEP08(2024)234</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP08(2024)234" target="_blank" >10.1007/JHEP08(2024)234</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at root sNN=5.02 TeV

Popis výsledku v původním jazyce

The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at root sNN = 5.02 TeV down to transverse momentum (p(T)) of 0.5 GeV/c and 2 GeV/c, respectively, with ALICE. The results obtained in p-Pb collisions are based on a novel three-particle correlation technique. The azimuthal anisotropy coefficient v(2) in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8 sigma at low p(T), and its magnitude is smaller than in semicentral Pb-Pb collisions. In contrast to the measurements in Pb-Pb collisions, the v(2) coefficient is also found independent of p(T) within uncertainties. Comparisons with the inclusive charged-particle v(2) and with AMPT calculations are discussed. The predictions suggest that parton interactions play an important role in generating a non-zero jet-particle v(2) in p-Pb collisions, even though they overestimate the reported measurement. These observations shed new insights on the understanding of the origin of the collective behaviour of jet particles in small systems such as p-Pb collisions, and provide significant stringent new constraints to models.

Název v anglickém jazyce

Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at root sNN=5.02 TeV

Popis výsledku anglicky

The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at root sNN = 5.02 TeV down to transverse momentum (p(T)) of 0.5 GeV/c and 2 GeV/c, respectively, with ALICE. The results obtained in p-Pb collisions are based on a novel three-particle correlation technique. The azimuthal anisotropy coefficient v(2) in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8 sigma at low p(T), and its magnitude is smaller than in semicentral Pb-Pb collisions. In contrast to the measurements in Pb-Pb collisions, the v(2) coefficient is also found independent of p(T) within uncertainties. Comparisons with the inclusive charged-particle v(2) and with AMPT calculations are discussed. The predictions suggest that parton interactions play an important role in generating a non-zero jet-particle v(2) in p-Pb collisions, even though they overestimate the reported measurement. These observations shed new insights on the understanding of the origin of the collective behaviour of jet particles in small systems such as p-Pb collisions, and provide significant stringent new constraints to models.

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/LM2018104" target="_blank" >LM2018104: 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

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2024

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

28

Strana od-do

—

Kód UT WoS článku

001355891500002

EID výsledku v databázi Scopus

2-s2.0-85202924771