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A no-go theorem for the dark matter interpretation of the positron anomaly
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astro-ph.HEhep-ph
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darkmatterams-02annihilationsanomalybackgroundconsequenceconsidered
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The overabundance of high-energy cosmic positrons, observed by PAMELA and AMS-02, can be considered as the consequence of dark matter decays or annihilations. We show that recent FERMI/LAT measurements of the isotropic diffuse gamma-ray background impose severe constraints on dark matter explanations and make them practically inconsistent.
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