Figure 1

Raw OS dimuon $p_{\mathrm T}$ distribution for the invariant mass range 2.8 $< m_{\mu^+\mu^-}< $ 3.4 Gev/$c^2$ and centrality class 70-90$\%$. Vertical error bars are the statistical uncertainties. The red line represents the $p_{\mathrm T}$ distribution of coherently photoproduced J/$\psi$ as predicted by the STARLIGHT MC generator in Pb-Pb ultra-peripheral collisions and convoluted with the response function of the muon spectrometer. The normalization of the red line is given by the measured number of J/$\psi$ in excess reported in Table [1] after correction for the $\psi$(2S) feed-down and incoherent contributions (see text).
[png]   [pdf]   [eps]