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Novel dark matter constraints from antiprotons in the light of AMS-02 · Around

2016

Novel dark matter constraints from antiprotons in the light of AMS-02

Cuoco, Alessandro, Krämer, Michael, Korsmeier, Michael

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We evaluate dark matter (DM) limits from cosmic-ray antiproton observations using the recent precise AMS-02 measurements.

We properly take into account cosmic-ray propagation uncertainties fitting at the same time DM and propagation parameters, and marginalizing over the latter.
We find a significant (~4.5 sigma) indication of a DM signal for DM masses near 80 GeV, with a hadronic annihilation cross-section close to the thermal value, sigma v ~3e-26 cm3s-1.
Intriguingly, this signal is compatible with the DM interpretation of the Galactic center gamma-ray excess.

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