Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Invited Talks II

HK 39.2: Invited Talk

Thursday, March 13, 2025, 11:30–12:00, Kurt-Alder HS Chemie

Antiproton production measurement for indirect Dark Matter search at the AMBER experiment at CERN — •Davide Giordano — Torino Section of INFN, 10125 Turin, Italy

One of the indirect detection method of dark matter (DM) is based on the search of the products of DM annihilation or decay. They should appear as distortions in the gamma rays spectra and in the rare Cosmic Ray (CR) components, like antiprotons, positrons and antideuterons. In particular, the antiprotons in the Galaxy are mainly of secondary origin, produced by the scattering of cosmic proton and helium nuclei off the hydrogen and helium in the interstellar medium (ISM). In order to obtain a significant sensitivity to DM signals, accurate measurements of the antiproton production cross section in p-p and p-He collisions are crucial. The AMBER experiment at CERN collected in 2023 the first data ever in p+He collisions at a center of mass energies from 10 to 21 GeV. In addition, another poorly understood antiproton production method is the contribution from antineutrons decays, which remains experimentally unexplored. Unlike antiprotons, the yield of antineutrons in collisions is typically inferred based on theoretical principles, primarily relying on isospin symmetry. In 2024, the AMBER data collection was expanded to include p+H and p+D collisions to indirectly measure with unprecedented precision the possible antiproton production asymmetry in in p+n collisions.

Keywords: AMBER; Dark Matter; Antiproton production cross section