Measurements of inclusive J/ψ production at midrapidity and forward rapidity in 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%3A00377068" target="_blank" >RIV/68407700:21340/24:00377068 - isvavai.cz</a>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

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/LM2023040" target="_blank" >LM2023040: 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

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

849

Číslo periodika v rámci svazku

Feb

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

20

Strana od-do

—

Kód UT WoS článku

001185574400001

EID výsledku v databázi Scopus

2-s2.0-85185297531