The differential cross section times branching ratio ${\rm B.R.}_{\psi(2{\rm S})\rightarrow\mu^+\mu^-}{\rm d}\sigma^{\psi(2{\rm S})}/{\rm d}y$ for $p_{\rm T}<12$ GeV/$c$. The error bars represent the statistical uncertainties, while the boxes correspond to total  systematic uncertainties. The latter are uncorrelated among the points, except for a very small correlated uncertainty (0.5\% and 0.7\% for the forward and backward $y_{\rm cms}$ samples, respectively). The grey bands correspond to the reference pp cross section scaled by A$_{\rm Pb}$.