Figure 1

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