München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 61: Fundamental Symmetries and Astroparticle Physics

HK 61.4: Vortrag

Freitag, 22. März 2019, 15:15–15:30, HS 18

Simulation of Cosmic-Ray Antimatter Fluxes — •Laura Serksnyte, Laura Fabbietti, Martin J. Losekamm, Stephan Paul, and Thomas Pöschl — Technische Universität München, München, Deutschland

Measuring antimatter in space probes various astrophysical processes. The abundancies and energy spectra of antiparticles reveal details of the creation and propagation of cosmic-ray particles in the universe. Abnormalities in their spectra can reveal exotic sources or inaccuracies in our understanding of the involved processes. Especially the search for cosmic antideuterons and antihelium may reveal exotic production processes---such as dark-matter annihilation---as the background production rate through inelastic scattering of cosmic-ray protons is very low. However, these particles are strongly influenced by the magnetic fields of the Sun and Earth, modifying the expected particle flux for experiments near Earth. We discuss the production of secondary anti-ions in Earth's atmosphere as an additional background production mechanism. We simulate the propagation and interaction of the particles in Earth's proximity to extract the location-dependent antiparticle flux and to evaluate the suitability of different locations in space for experiments that search for low-energy cosmic-ray anti-ions.