Erlangen 2026 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Heavy-Ion Collisions and QCD Phases III
HK 23.4: Talk
Wednesday, March 18, 2026, 14:45–15:00, PHIL C 301
J/Ψ measurement at midrapidity in Pb−Pb collisions at √sNN= 5.36 TeV with the ALICE central barrel — •Jonathan Witte for the ALICE Germany collaboration — Universität Heidelberg
The interaction of heavy flavour quarks in the quark-gluon plasma has been under investigation for more than two decades. After the melting of bound charmonium states have been firmly established, the focus moved towards regeneration effects at higher collision energies. First results from Pb−Pb collisions at the LHC provided strong support for this picture, offering important experimental constraints for both thermal and transport hadronisation models. The newest ALICE data collected in LHC Run 3 - featuring a new time projection chamber and higher interaction rate - opens the door to precision measurements of J/Ψ production at midrapidity. The J/Ψ is reconstructed in the dielectron decay channel, with the two electrons measured in the central barrel. While the data taking is still in progress, the final analysis is under development. The current focus here is on the optimisation on the electron identification and the description of the background, increased due to the high interaction rates. In the talk I will present the analysis status and show the first stable J/Ψ signals from the Run 3 Pb−Pb data.
Keywords: Charmonium; Heavy Flavour; Hadronisation; Quark-Gluon Plasma