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- W2527472889 abstract "The inclusive J/$psi$ production has been studied in Pn-Pb and pp collisions at the centre-of-mass energy per nucleon pair $sqrt{s_{rm NN}}=5.02$ TeV, using the ALICE detector at the CERN LHC. The J/$psi$ meson is reconstructed, in the centre-of-mass rapidity interval $2.5<y<4$ and in the transverse-momentum range $p_{rm T}<12$ GeV/$c$, via its decay to a muon pair. In this Letter, we present results on the inclusive J/$psi$ cross section in pp collisions at $sqrt{s}=5.02$ TeV and on the nuclear modification factor $R_{rm AA}$. The latter is presented as a function of the centrality of the collision and, for central collisions, as a function of the transverse momentum $p_{rm T}$ of the J/$psi$. The measured $R_{rm AA}$ values indicate a suppression of the J/$psi$ in nuclear collisions and are then compared to our previous results obtained in Pb-Pb collisions at $sqrt{s_{rm NN}}=2.76$ TeV. The ratio of the $R_{rm AA}$ values at the two energies is also computed and compared to calculations of statistical and dynamical models. The numerical value of the ratio for central events (0-10% centrality) is $1.17 pm 0.04 {rm{(stat)}}pm 0.20 {rm{(syst)}}$. In central events, as a function of $p_{rm T}$, a slight increase of $R_{rm AA}$ with collision energy is visible in the region $2<p_{rm T}<6$ GeV/$c$. Theoretical calculations provide a good description of the measurements, within uncertainties." @default.
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