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Résumé |
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 model used to describe the formation of light
(anti-) nuclei. Then 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 these
antinuclei. If time permits, I discuss also how antinuclei can be used as a tool
to study to the formation of a quark-gluon plasma in accelerator experiments. |
