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The ALICE Collaboration has studied inclusive J/$\psi$ and $\psi$(2S)production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV with the MuonSpectrometer. The measurement was performed at forward (2.03 $<$ $y_{\rm cms}$$<$ 3.53) and backward ($-$4.46 $<$ $y_{\rm cms}$ $<$ $-$2.96) centre of massrapidities. The nuclear modification factor of J/$\psi$ and $\psi$(2S) has beenmeasured as a function of transverse momentum and event activity. Theoreticalmodels based on nuclear shadowing, coherent energy loss or both are inreasonable agreement with the J/$\psi$ results but cannot describe the$\psi$(2S) behaviour. Other mechanisms must be invoked in order to explain the$\psi$(2S) suppression in p-Pb collisions.

Suppression of inclusive J/$\mathbf{\psi}$ and $\mathbf{\psi}$(2S) production in p-Pb collisions with ALICE at the LHC