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Gamma-Ray Constraint on Galactic Positron Production by MeV Dark Matter
John F. Beacom, Nicole F. Bell, Gianfranco Bertone
The Galactic positrons, as observed by their annihilation gamma-ray line at 0.511 MeV, are difficult to account for with astrophysical sources. It has been proposed that they are p…
Gamma ray bursts and the origin of galactic positrons
Gianfranco Bertone, Alexander Kusenko, Sergio Palomares-Ruiz +2
A recent observation of the 511 keV electron-positron annihilation line from the Galactic bulge has prompted a debate on the origin of the galactic positrons responsible for this e…
Neutrinos from Dark Matter annihilations at the Galactic Centre
Gianfranco Bertone, Emmanuel Nezri, Jean Orloff +1
We discuss the prospects for detection of high energy neutrinos from dark matter annihilation at the Galactic centre. Despite the large uncertainties associated with our poor knowl…