The measurement of antiparticles in cosmic rays (CRs) has revealed our limited knowledge on their production and propagation throughout the Galaxy. Even the first tentative antinuclei events detected by AMS-02 are generating a remarkable debate in the community. In particular, early analyses of the AMS-02 antiproton spectrum revealed the possibility of an anomaly that fit very well with the expected production from a weakly interacting massive particle (WIMP). We present here an antiproton analysis in combination with different ratios of B, Be and Li and use these models to update expectations on the flux of antinuclei with newly derived cross sections and WIMP annihilation spectra.

We find that the expected antideuteron flux is compatible with the hint of a few events detected by AMS-02 while the derived flux of antihelium is still around one order of magnitude below the current sensitivity of AMS-02. This, if the preliminary signal of antihelium events detected is confirmed, opens a window for new astrophysical production mechanisms and physics beyond the standard model.