SPACE AND COSMIC RAY PHYSICS ONLINE SEMINAR

University of Maryland
4:30 PM Monday, March 4, 2024
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Michael Kachelriess
Norwegian University of Science and Technology, Torgarden, Norway

Antinuclei as probe for exotic physics

Antideuteron and antihelium nuclei have been proposed as promising detection channels for dark matter because of the low astrophysical backgrounds expected. After a brief review of the current experimental situation, I discuss some of the various flavors of the coalescence models used to describe the formation of light (anti-) nuclei. In particular, I present results for a newly developed coalescence model based on the Wigner function representations of the produced nuclei states, which includes both the process-dependent size of the formation region of antinuclei, and the momentum correlations of coalescing antinucleons in a semi-classical picture. Therefore this model allows one to calculate in a consistent frame-work the antideuteron and antihelium fluxes both from secondary production and from dark matter annihilations, and I present results for resulting fluxes of antideuterons and antihelium.