Measurements of inclusive J/ψ production at midrapidity and forward rapidity in Pb-Pb collisions at root sNN=5.02 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00377068" target="_blank" >RIV/68407700:21340/24:00377068 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.physletb.2024.138451" target="_blank" >https://doi.org/10.1016/j.physletb.2024.138451</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.138451" target="_blank" >10.1016/j.physletb.2024.138451</a>

Result language

angličtina

Original language name

Measurements of inclusive J/ψ production at midrapidity and forward rapidity in Pb-Pb collisions at root sNN=5.02 TeV

Original language description

The measurements of the inclusive J/psi yield at midrapidity (|y| < 0.9) and forward rapidity (2.5 < y < 4) in Pb-Pb collisions at root s(NN) = 5.02 TeV with the ALICE detector at the LHC are reported. The inclusive J/psi production yields and nuclear modification factors, R-AA, are measured as a function of the collision centrality, J/psi transverse momentum (p(T)), and rapidity. The J/psi average transverse momentum and squared transverse momentum (< p(T)> and < p(T)(2)>) are evaluated as a function of the centrality at midrapidity. Compared to the previous ALICE publications, here the entire Pb-Pb collisions dataset collected during the LHC Run 2 is used, which improves the precision of the measurements and extends the p(T) coverage. The p(T)-integrated R-AA shows a hint of an increasing trend towards unity from semicentral to central collisions at midrapidity, while it is flat at forward rapidity. The p(T)-differential R-AA shows a strong suppression at high p(T) with less suppression at low p(T) where it reaches a larger value at midrapidity compared to forward rapidity. The ratio of the p(T)-integrated yields of J/psi to those of D-0 mesons is reported for the first time for the central and semicentral event classes at midrapidity. Model calculations implementing charmonium production via the coalescence of charm quarks and antiquarks during the fireball evolution (transport models) or in a statistical approach with thermal weights are in good agreement with the data at low p(T). At higher p(T), the data are well described by transport models and a model based on energy loss in the strongly-interacting medium produced in nuclear collisions at the LHC.

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

10303 - Particles and field physics

Project

<a href="/en/project/LM2023040" target="_blank" >LM2023040: Research infrastructure for experiments at CERN</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

Name of the periodical

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Volume of the periodical

849

Issue of the periodical within the volume

Feb

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

20

Pages from-to

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UT code for WoS article

001185574400001

EID of the result in the Scopus database

2-s2.0-85185297531