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Dark matter and pulsar origins of the rising cosmic ray positron fraction in light of new data from the AMS

Dark matter and pulsar origins of the rising cosmic ray positron fraction in light of new data from the AMS

The rise of the cosmic ray positron fraction with energy, as first observed with high confidence by PAMELA, implies that a large flux of high energy positrons has been recently (or is being currently) injected into the local volume of the Milky Way. With the new and much more precise …