Cosmic Ray Antihelium Probe for the Origin of the Baryonic Matter in the Universe

Several candidates for antihelium events have been found in the AMS-02 experiment. They cannot be created by natural astrophysical sources and, if confirmed, imply the existence of antimatter stars in our galaxy. This immediately reduces the class of inflationary models with baryosynthesis to those that can provide the creation of an antimatter domain of surviving size together with the general baryon asymmetry of the Universe. To confront the future results of experimental searches for cosmic antihelium with predictions of this hypothesis, we develop numerical studies of the creation and propagation of antihelium flux from antimatter globular clusters in the Galaxy. This article presents the results of such a simulation: a function of the magnetic cut-off for the penetration of antihelium nuclei into the Galaxy disk and an estimate of the energy range in which the search and detection of antihelium is most optimal.

Automated summary

Several candidates for anti-helium events have been discovered in the AMS-02 experiment, suggesting the existence of antimatter stars in our galaxy. Numerical studies were conducted to simulate the creation and propagation of anti-helium flux from antimatter globular clusters, providing insights into the magnetic cutoff for the penetration of anti-helium nuclei into the Galaxy disk and the energy range for optimal search and detection of anti-helium.