Speaker
Fiorella Fionda
(Universita e INFN (IT))
Description
The ALICE detector provides excellent capabilities to study
quarkonium production at the Large Hadron Collider (LHC).
Quarkonia, bound states of heavy (charm or bottom) quark
anti-quark pairs such as the J/psi, are expected to be
produced by initial hard processes. Thus they will provide
insight into the earliest and hottest stages of A-A
collisions where the formation of a Quark-Gluon Plasma (QGP)
is expected. Furthermore, high-precision data from pp
collisions represent an essential baseline for the
measurement of nuclear modifications in heavy-ions and serve
also as a crucial test for several models of quarkonium
hadroproduction. In addition, the study of pA collisions
allows to investigate nuclear modifications due to cold
nuclear matter effects.
In ALICE, J/psi have been measured in pp, p-Pb and Pb-Pb down
to pT = 0 via their di-electron decay channel in the central
barrel (|y| < 0.9). Results on the nuclear modification factor
(RAA) at central rapidities in Pb-Pb collisions at sqrt{sNN} =
2.76 TeV, as well as a first look into p-Pb data at sqrt{s} =
5.02 TeV will be shown and their implications discussed. A
separation of the prompt and non-prompt components is also
possible down to a pT of the J/psi of a few GeV/c, which
allows to study the beauty hadron nuclear modification factor
down to almost zero pT.
Primary author
Fiorella Fionda
(Universita e INFN (IT))
