Overview of the ALICE experiment results at LHC

11h GANIL seminar room (105)

a coffee will be served 15mn before

Quantum Chromodynamics, the theory of strong interaction, predicts a new
phase of matter for extremely high temperature and/or density, the Quark Gluon
Plasma (QGP). The QGP could have composed the universe few micro-seconds
after the Big Bang and might exist in the core of neutron stars.
ALICE (A Large Ion Collider Experiment) is the LHC (Large Hadron Col-
lider) experiment dedicated to the study of heavy ion collisions and its main
purpose is to investigate the properties of deconfined nuclear matter. Further-
more, a complete understanding of particle production mechanisms in heavy-ion
collisions requires the study of their production in proton-proton collisions.
Since 2010, ALICE has successfully taken p-p data at ps = 2.76 TeV and
ps = 7 TeV and Pb-Pb data at ps
NN = 2.76 TeV. After a general introduction
on ultra-relativistic heavy ion collisions, the latest results of the ALICE experi-
ment in p-p and Pb-Pb collisions will be presented. In particular, measurement
performed on the Pb-Pb data sample such as the nuclear modification factors
RAA and the flow of light hadrons and quarkonia will be discussed.
1lopez@