RMS values extracted from the fits for the Gaussian (narrow) and inverse gamma (wide) components. The middle and bottom plots show ratios of models to data for the wide and narrow components, respectively. The grey filled bands with (without) a hatched line in the ratio plots represent the statistical (systematic) uncertainties of the p--Pb data. Note that pp data points are shifted by -2 GeV/$c$ on the horizontal axis to be distinguished from p--Pb data points.