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• W2737814791 abstract "We compute the energy spectra of antideuterons () and antihelium () in cosmic rays (CRs) in a scenario where hadronic interactions inside supernova remnants (SNRs) can produce a diffusively shock-accelerated source component of secondary antinuclei. The key parameters that specify the SNR environment and the interstellar CR transport are tightly constrained with the new measurements provided by the AMS experiment on the B/C ratio and on the / ratio. The best-fit models obtained from the two ratios are found to be inconsistent with each other, as the / data require enhanced secondary production. Thus, we derive conservative (i.e., B/C-driven) and speculative (/-driven) upper limits to the SNR flux contributions for the and spectra in CRs, along with their standard secondary component expected from CR collisions in the interstellar gas. We find that the source component of antinuclei can be appreciable at kinetic energies above a few ∼10 GeV n−1, but it is always sub-dominant below a few GeV n−1, that is the energy window where dark matter (DM) annihilation signatures are expected to exceed the level of secondary production. We also find that the total (standard + SNR) flux of secondary and is tightly constrained by the data. Thus, the presence of interaction processes in SNRs does not critically affect the total background for DM searches." @default.
• W2737814791 created "2017-07-31" @default.
• W2737814791 creator A5003318036 @default.
• W2737814791 creator A5014305593 @default.
• W2737814791 date "2017-08-01" @default.
• W2737814791 modified "2023-09-25" @default.
• W2737814791 title "Production and Acceleration of Antinuclei in Supernova Shockwaves" @default.
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• W2737814791 doi "https://doi.org/10.3847/2041-8213/aa80da" @default.
• W2737814791 hasPublicationYear "2017" @default.
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