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

Result code in 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>

Alternative codes found

RIV/68378271:_____/24:00585195

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10304 - Nuclear physics

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Volume of the periodical

2024

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

30

Pages from-to

199

UT code for WoS article

001187990700001

EID of the result in the Scopus database

2-s2.0-85188751771