J/$\psi$ and $\psi$(2S) production in p-Pb collisions at $\sqrt{s_{NN}}=\mathrm{5.02}$ TeV with ALICE at the LHC

TL;DR

This paper reports on the measurement of J/ψ and ψ(2S) production in proton-lead collisions at 5.02 TeV at the LHC, showing differences in nuclear modification factors and comparing results with theoretical models.

Contribution

First measurement of J/ψ and ψ(2S) production in p-Pb collisions at 5.02 TeV with detailed decay channel analysis and nuclear modification factors.

Findings

J/ψ production agrees with theoretical predictions

ψ(2S) shows smaller nuclear modification factor than J/ψ

Results provide insights into cold nuclear matter effects

Abstract

The ALICE Collaboration has studied the inclusive J/$\psi$ and $\psi(\mathrm{2S})$ production in p-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV, at the CERN LHC. The J/$\psi$ measurement is performed in the $\mu^{+}\mu^{-}$ and in the $e^{+}e^{-}$ decay channels, down to zero $p_{\mathrm{T}}$. The results are in fair agreement with theoretical predictions. The $\psi(\mathrm{2S})$ measurement has also been performed. In particular, a smaller $\psi(\mathrm{2S})$ nuclear modification factor, with respect to the J$/\psi$ one, has been observed.