PRESENTATION

The ALICE experiment is one of four large experiments installed at the LHC (Large Hadron Collider) at CERN. Its aim is to study the quark and gluon plasma (QGP) which would have constituted the Universe a few microseconds after the Big Bang, before the elementary constituents of matter, quarks and gluons, are confined in hadrons. At the LHC, QGP is produced by means of collisions between heavy ions (for example Lead-Lead) which makes it possible to reach the critical temperature beyond which the strong interaction predicts the deconfinement of quarks and gluons. For a good understanding of the characteristics and properties of the QGP, measurements are also carried out in proton-proton, proton-ion and ion-ion collisions of smaller size. The ALICE collaboration currently brings together more than 1,800 members from around 160 laboratories spread across around forty countries. The detector is designed to simultaneously measure all QGP signals in a high particle density environment. It consists of a central part and a muon spectrometer covering small angles (2-9 degrees).

THE ACTIVITIES OF THE ALICE LPCA TEAM

After the first ten years of operation of the LHC beams in the initial configuration of the ALICE experiment, large-scale modifications have been carried out since 2012 to enable a greater quantity of data to be collected with more precision. The LPCA ALICE team contributed to the construction and installation of the front-end electronics of the Muon IDentifier as well as to the new silicon pixel detector called Muon Forward Tracker which improves muon vertex pointing. The data analyzes carried out within the team concern heavy flavors, quarkonia and electroweak bosons in the (di-)leptonic channel, and jets in pp, p–Pb, Xe–Xe and Pb–Pb collisions from $\sqrt{s}_{NN}=0.9$ to 13.6 TeV. Studies focus on cross section and production mechanisms, nuclear modification factor, collective behavior and polarization. They have given rise to numerous presentations at conferences, around twenty publications and other articles are being written.