Related paper Differential studies of inclusive J/$ψ$ and $ψ$(2S) production at forward rapidity in Pb-Pb collisions at $\mathbf{\sqrt{{\textit s}_{_{NN}}}}$ = 2.76 TeV Fit to the opposite-sign dimuon invariant mass distribution after background subtraction in the 0-20$\%$ (upper row) and 40-90$\%$ (lower row) centrality classes, for $2.5 < y < 4$, in various $p_{\rm T}$ intervals.[png] [pdf]