Measurements of long-range two-particle correlation over a wide pseudorapidity range in p-Pb collisions at √sNN=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00585195" target="_blank" >RIV/61389005:_____/24:00585195 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00585195

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP01(2024)199" target="_blank" >https://doi.org/10.1007/JHEP01(2024)199</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP01(2024)199" target="_blank" >10.1007/JHEP01(2024)199</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurements of long-range two-particle correlation over a wide pseudorapidity range in p-Pb collisions at √sNN=5.02 TeV

Popis výsledku v původním jazyce

Correlations in azimuthal angle extending over a long range in pseudorapidity between particles, usually called the 'ridge' phenomenon, were discovered in heavy-ion collisions, and later found in pp and p-Pb collisions. In large systems, they are thought to arise from the expansion (collective flow) of the produced particles. Extending these measurements over a wider range in pseudorapidity and final-state particle multiplicity is important to understand better the origin of these long-range correlations in small collision systems. In this Letter, measurements of the long-range correlations in p-Pb collisions at root s(NN) = 5.02 TeV are extended to a pseudorapidity gap of Delta eta similar to 8 between particles using the ALICE forward multiplicity detectors. After suppressing non-flow correlations, e.g., from jet and resonance decays, the ridge structure is observed to persist up to a very large gap of Delta eta similar to 8 for the first time in p-Pb collisions. This shows that the collective flow-like correlations extend over an extensive pseudorapidity range also in small collision systems such as p-Pb collisions. The pseudorapidity dependence of the second-order anisotropic flow coefficient, v(2)(eta), is extracted from the long-range correlations. The v(2)(eta) results are presented for a wide pseudorapidity range of -3.1 < eta < 4.8 in various centrality classes in p-Pb collisions. To gain a comprehensive understanding of the source of anisotropic flow in small collision systems, the v(2)(eta) measurements are compared with hydrodynamic and transport model calculations. The comparison suggests that the final-state interactions play a dominant role in developing the anisotropic flow in small collision systems.

Název v anglickém jazyce

Measurements of long-range two-particle correlation over a wide pseudorapidity range in p-Pb collisions at √sNN=5.02 TeV

Popis výsledku anglicky

Correlations in azimuthal angle extending over a long range in pseudorapidity between particles, usually called the 'ridge' phenomenon, were discovered in heavy-ion collisions, and later found in pp and p-Pb collisions. In large systems, they are thought to arise from the expansion (collective flow) of the produced particles. Extending these measurements over a wider range in pseudorapidity and final-state particle multiplicity is important to understand better the origin of these long-range correlations in small collision systems. In this Letter, measurements of the long-range correlations in p-Pb collisions at root s(NN) = 5.02 TeV are extended to a pseudorapidity gap of Delta eta similar to 8 between particles using the ALICE forward multiplicity detectors. After suppressing non-flow correlations, e.g., from jet and resonance decays, the ridge structure is observed to persist up to a very large gap of Delta eta similar to 8 for the first time in p-Pb collisions. This shows that the collective flow-like correlations extend over an extensive pseudorapidity range also in small collision systems such as p-Pb collisions. The pseudorapidity dependence of the second-order anisotropic flow coefficient, v(2)(eta), is extracted from the long-range correlations. The v(2)(eta) results are presented for a wide pseudorapidity range of -3.1 < eta < 4.8 in various centrality classes in p-Pb collisions. To gain a comprehensive understanding of the source of anisotropic flow in small collision systems, the v(2)(eta) measurements are compared with hydrodynamic and transport model calculations. The comparison suggests that the final-state interactions play a dominant role in developing the anisotropic flow in small collision systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear 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

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2024

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

30

Strana od-do

199

Kód UT WoS článku

001187990700001

EID výsledku v databázi Scopus

2-s2.0-85188751771