The Cosmic Ray Antiproton Background for AMS-02

Understand

The AMS-02 experiment is measuring the cosmic ray antiproton flux with high precision.

• The interpretation of the upcoming data requires a thorough understanding of the secondary antiproton background.
• In this work, we employ newly available data of the NA49 experiment at CERN, in order to recalculate the antiproton source term arising from cosmic ray spallations on the interstellar matter.
• We systematically account for the production of antiprotons via hyperon decay and discuss the possible impact of isospin effects on antineutron production.