J/{\psi} production in pp collisions and in Pb-Pb collisions at the LHC with the ALICE experiment

TL;DR

This paper presents measurements of J/ψ meson production in proton-proton and lead-lead collisions at the LHC, analyzing their yields and nuclear modification factors to understand quark-gluon plasma effects.

Contribution

It provides new experimental data on J/ψ production at different energies and collision systems, comparing results to theoretical models of quarkonium suppression.

Findings

J/ψ production measured at 2.76 TeV and 7 TeV in pp collisions.

J/ψ yields in Pb-Pb collisions analyzed for nuclear modification.

Results compared with existing theoretical models.

Abstract

We report the recent measurements of the inclusive J/{\psi} production in pp collisions at \sqrt{s} = 2.76 TeV, in pp collisions at \sqrt{s} = 7 TeV and in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV with the ALICE detector at the LHC. The J/{\psi} mesons are detected down to pT = 0 GeV/c via their di-muon decay channel at forward rapidity (2.5 < y < 4) and via their di-electron decay channel at mid-rapidity (|y| < 0.9). A special emphasis is put on the nuclear modification factor which is compared to the predictions of current J/{\psi} production models.