Figure 4

Examples of squared mass-over-charge ratio distributionsfor protons (left), deuterons (centre) and $\rm{^{3}He}$ (right) in selectedrigidity intervals. Particle and anti-particle spectraare in the top and bottom panels, respectively. The fit function (red curve)also includes an exponential term to describe the background In the rigidity intervals shown here the backgroundcorresponds to about 2% for (anti-)protons,and to about 4% for(anti-)deuterons, while it is 0.7% for $\rm{^{3}He}$ and $\rm{^{3}\overline{He}}$.