LHC Seminar

Charmonium production in Pb-Pb collisions at ALICE: from suppression to regeneration ?

by Enrico Scomparin (Universita e INFN Torino (IT))

503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber


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Heavy quarkonium states are considered as one of the key observables for the study of the phase transition from a system made of hadrons towards a Quark-Gluon Plasma. In the last 25 years, experiments at CERN and Brookhaven have studied collisions of heavy ions looking for a suppression of charmonia/bottomonia, considered as a signature of the phase transition. After an introduction to the main concepts behind these studies, I will present the results obtained in Pb-Pb collisions by the ALICE experiment. The ALICE results will be critically compared to those of lower energy experiments, to CMS/ATLAS results, and to various model calculations. The large cross sections for heavy-quark production at LHC energies are expected to induce a novel production mechanism for charmonia in heavy-ion collisions, related to a (re)combination of ccbar pairs along the history of the collision and/or at hadronization. The occurrence of such a process at the LHC will be discussed. Finally, prospects for future measurements will be addressed.
Video in CDS
Organized by

M. Mangano, C. Lourenco, G. Unal......................... Tea and Coffee will be served at 10h30

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