TY  - GEN
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/31143/
ID  - heidok31143
TI  - Inclusive J/? production in Pb?Pb collisions at ?s_NN = 5.02 TeV with ALICE
CY  - Heidelberg
A1  - Gromada, Alena
Y1  - 2022///
AV  - public
N2  - The J/? mesons is a bound state of a charm quark and its anti-quark. The production of J/? mesons serves as an important probe of the quark-gluon plasma (QGP) formed in heavy-ion collisions. The presence of the deconfined strongly interacting medium results in the color screening of the potential between charm quarks and anti-quarks created during hard scattering processes. At sufficiently high collision energies such as the LHC energy, the large abundance of produced charm quarks leads to the (re)generation of J/? mesons during the QGP evolution and/or at the phase boundary.
In this work, the J/? production yield in Pb?Pb collisions at ?s_NN = 5.02 TeV recorded by
ALICE is measured at midrapidity via the dielectron decay channel J/? ? e+e? as a function of centrality and as a function of transverse momentum down to p_T = 0.15 GeV/c in the most central and semi-central collisions. The J/? nuclear modification factor R_AA increases slightly from
semi-central to the most central collisions. The p_T -differential J/? R_AA shows a large suppression of the J/? yield at high p_T and the J/? R_AA increases with decreasing p_T. The measurement is compared to other experimental results and to model calculations. The presented results strongly support picture of (re)generation as an important J/? production mechanism at the LHC especially significant at low p T and at midrapidity.
ER  -