Coherent J/ψ photoproduction at midrapidity 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%2F25%3A00389321" target="_blank" >RIV/68407700:21340/25:00389321 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2025.139952" target="_blank" >https://doi.org/10.1016/j.physletb.2025.139952</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2025.139952" target="_blank" >10.1016/j.physletb.2025.139952</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Coherent J/ψ photoproduction at midrapidity in Pb - Pb collisions at root sNN=5.02 TeV

Popis výsledku v původním jazyce

The coherent J/psi photoproduction cross section is measured for the first time at midrapidity in peripheral to semicentral Pb - Pb collisions at root s(NN) = 5.02 TeV. The centrality differential cross section d sigma/dy is reported for the centrality range 40-90%, together with the doubly-differential cross section d(2)sigma/dydp(T), extracted in two peripheral centrality classes. The J/psi mesons are reconstructed in the dielectron channel, in the rapidity interval |y| < 0.9 using the ALICE central barrel detectors. The J/psi cross section at midrapidity is statistically compatible to the earlier ALICE measurement at forward rapidity and at the same centre-of-mass energy, and shows only a mild centrality dependence over the covered range. Several sets of theoretical calculations taking into account the hadronic overlap in the collisions but ignoring possible final-state effects from a hot expanding medium are found to give a fairly good description of the current measurements within uncertainties.

Název v anglickém jazyce

Coherent J/ψ photoproduction at midrapidity in Pb - Pb collisions at root sNN=5.02 TeV

Popis výsledku anglicky

The coherent J/psi photoproduction cross section is measured for the first time at midrapidity in peripheral to semicentral Pb - Pb collisions at root s(NN) = 5.02 TeV. The centrality differential cross section d sigma/dy is reported for the centrality range 40-90%, together with the doubly-differential cross section d(2)sigma/dydp(T), extracted in two peripheral centrality classes. The J/psi mesons are reconstructed in the dielectron channel, in the rapidity interval |y| < 0.9 using the ALICE central barrel detectors. The J/psi cross section at midrapidity is statistically compatible to the earlier ALICE measurement at forward rapidity and at the same centre-of-mass energy, and shows only a mild centrality dependence over the covered range. Several sets of theoretical calculations taking into account the hadronic overlap in the collisions but ignoring possible final-state effects from a hot expanding medium are found to give a fairly good description of the current measurements within uncertainties.

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

2025

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

871

Číslo periodika v rámci svazku

139952

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

001652171000001

EID výsledku v databázi Scopus

2-s2.0-105024351334