“…The origin of the source term remains unclear: both astrophysical sources, such as pulsars, and dark-matter annihilation are candidates to describe the positron flux data. …”
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“…In the case of positrons, the additional contribution cannot be explained by a pure secondary component and the inclusion of nearby primary sources is necessary, whether of astrophysical (pulsars) or a more exotic (dark matter) origin. The annihilation or decay of dark matter into Standard Model particles may produce an excess of antimatter particles in cosmic rays, thus allowing for an indirect search of dark matter. …”
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