Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Invited Talks I

HK 12.3: Hauptvortrag

Dienstag, 12. März 2024, 12:00–12:30, HBR 14: HS 1

Measurement of Antiproton-Production Cross Sections at AMBER — •Thomas Pöschl for the AMBER collaboration — European Organization for Nuclear Research (CERN), Geneva, Switzerland

To the best of our knowledge, cosmic-ray antiprotons are exclusively produced by interactions of cosmic rays with interstellar material. By comparing their measured flux with our expectations, we can test for the presence of exotic sources of antimatter, such as dark matter annihilations. This method requires a precise knowledge of antiproton production over a wide range of collision energies and for different collision systems as they occur in the Galaxy. For collisions of protons with light ions such as helium, experimental data are sparse, limiting the interpretation of the measured cosmic antiproton flux.

The AMBER collaboration aims to measure antiproton production in collisions of protons with hydrogen, deuterium, and helium at different collisions energies using the M2 beam line at CERN's SPS. First measurements of proton-helium collisions were recorded in 2023, and measurements with hydrogen and deuterium targets are planned for 2024. These data sets will be of particular interest for the investigation of a possible isospin-asymmetric production.

I will review our current knowledge of collisional antiproton production, the uncertainty of the production cross sections on the modeling of the cosmic antiproton flux, and the impact of the upcoming experimental data from AMBER.

Keywords: Experimental Physics; Antimatter; Cosmic Rays; Cross Sections