Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 59: Heavy Ion Collisions and QCD Phases XII
HK 59.7: Vortrag
Freitag, 31. März 2017, 16:00–16:15, F 3
J/ψ production in Pb-Pb collisions with ALICE at the LHC — Raul Tonatiuh Jimenez Bustamante1,2 and •Dennis Weiser2 for the ALICE collaboration — 1GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 2Physikalisches Institut, University of Heidelberg, Heidelberg
ALICE at the Large Hadron Collider provides unique capabilities to study charmonium production at low transverse momenta. In the early and hottest phase of nucleus-nucleus collisions the formation of a Quark-Gluon Plasma (QGP) is expected. Several QGP induced effects, such as the dissociation of charmonium states due to color screening and/or a (re)combination of uncorrelated charm and anti-charm quarks, can play a role. While a suppression of J/ψ with respect to pp collisions was indeed observed in heavy-ion collisions at all energies, recent measurements in Pb-Pb collisions at √sNN = 2.76 TeV indicate that (re)combination does seems to play an important role in the low pT region at LHC energies.
At central rapidity (|y| < 0.9) J/ψ are reconstructed via their e+ e− decay channel down to zero pT. The status of the measurement of inclusive J/ψ production and the nuclear modification factor at higher energies will be shown.