Speaker
Javier Castillo Castellanos
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
Description
ALICE is the LHC experiment devoted to the study of heavy-ion collisions. The main purpose of ALICE is to investigate the properties of the deconfined state of nuclear matter, the Quark-Gluon Plasma (QGP). Quarkonium measurements play a crucial role in this investigation. In particular, the sequential suppression of the quarkonium states by colour screening has long been suggested as a signature and thermometer of the QGP.
The first results on quarkonium suppression in Pb-Pb collisions at the LHC seem to indicate that for charmonia both regeneration and colour screening mechanisms play a role while for bottomonia the regeneration mechanism should be small. Initial state effects can play a role in bottomonium production in Pb-Pb collisions and thus should be studied using proton-nucleus collisions, where no deconfined state is expected to be created.
$\Upsilon$ production can be measured in ALICE in the dimuon decay channel using the forward muon spectrometer.
We will present the latest results on $\Upsilon$ production in pp, p-Pb and Pb-Pb collisions at LHC energies measured by the ALICE experiment at forward-rapidity.
| On behalf of collaboration: | ALICE |
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Author
Javier Castillo Castellanos
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
