Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 33: Nuclear Astrophysics II
HK 33.5: Vortrag
Dienstag, 29. März 2022, 17:15–17:30, HK-H10
Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources — •Laura Serksnyte1, S. Königstorfer1, I. Vorobyev1, L. Fabbietti1, D. M. Gomez Coral2, P. von Doetinchem2, J. Herms3, A. Ibarra1, T. Pöschl1, A. Shukla2, and A. Strong4 — 1TUM — 2University of Hawaii at Manoa — 3MPI für Kernphysik — 4MPI for Extraterrestial Physics
The studies of antinuclei cosmic rays are of great interest as they represent one of the most promising indirect probes of exotic phenomena in our Galaxy such as dark matter annihilation and primodial black hole evaporation. However, the antinuclei cosmic rays also contain a background contribution from antinuclei produced in cosmic-ray collisions with the interstellar gas. In order to interpret any future measurement of the cosmic ray antinuclei fluxes, it is imperative to have a full understanding of the uncertainties involved from production to propagation. This requires a data driven estimation of the production and annihilation cross sections of antinuclei, as well as a state-of-the-art propagation model. We studied the antideuteron cosmic-ray flux using the GALPROP propagation model and we obtained the fluxes stemming from exotic sources and from cosmic-ray interactions. We used the most up-to-date antideuteron production cross sections and for the first time included a data-driven estimation of the inelastic antideuteron cross sections. In this talk we will present our results including an in depth study of the prevailing uncertainties such as antideuteron production modeling, propagation parameters and others.