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Antideuterons as a Signature of Supersymmetric Dark Matter
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Antideuterons as a Signature of Supersymmetric Dark Matter
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Once the energy spectrum of the secondary component is well understood, measurements of the antiproton cosmic-ray flux at the Earth will be a powerful way to indirectly probe for the existence of supersymmetric relics in the galactic halo. Unfortunately, it is still spoilt by considerable theoretical uncertainties. As shown in this work, searches for low-energy antideuterons appear in the mean time as a plausible alternative, worth being explored. Above a few GeV/n, a dozen spallation antideuterons should be collected by the future AMS experiment on board ISSA. For energies less than about 3 GeV/n, the antideuteron spallation component becomes negligible and may be supplanted by a potential supersymmetric signal. If a few low-energy antideuterons are discovered, this should be seriously taken as a clue for the existence of massive neutralinos in the Milky Way.
Forward citations
Cited by 7 Pith papers
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Light Antinuclei Coalescence: Femtoscopic Constraints via Neural-Flow Surrogates
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Cosmic-Ray Signatures of Annihilating and Semi-Annihilating Dark Matter via One-Step Cascades
A largely model-independent framework links dark matter annihilation, mediator decays, and semi-annihilation to both thermal freeze-out and present-day gamma-ray, neutrino, and antimatter fluxes, with benchmarks showi...
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The General Antiparticle Spectrometer (GAPS) Antarctic Balloon Payload
GAPS has constructed and launched a stratospheric balloon spectrometer that uses silicon trackers and TOF detectors to identify low-energy antiprotons, antideuterons, and antihelium via exotic-atom formation and annih...
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Toward universal coalescence models for antideuteron production
Event-by-event coalescence models with a shared scale p_coal ≃ 0.2 GeV (or δ ≃ 1.7 fm) simultaneously fit ALICE pp (anti)deuteron spectra and ALEPH Z-decay antideuteron yields.
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Refined anti-proton and anti-deuteron fluxes from weak-scale Dark Matter
Updated tabulated interstellar fluxes of antiprotons and antideuterons from weak-scale DM are provided using new propagation schemes and inelastic cross-sections, showing greater robustness than prior calculations.
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Revisiting predictions for cosmic-ray antinucleon fluxes from Galactic Dark Matter
Updated predictions for cosmic antinuclei fluxes from dark matter yield tighter upper limits on light DM annihilation cross sections from AMS-02 antiproton data and show that GAPS could improve those limits by up to a...
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Dark Matter
A review summarizing current observational, experimental, and theoretical results on dark matter.
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