Speaker
Anna Lamperstorfer
(TUM)
Description
The rise in the positron fraction that was measured by the PAMELA experiment in 2008 was recently confirmed with unprecedented precision by the AMS-02 collaboration. In this talk Anna will review the calculation of the positron fraction and discuss three possible explanations of the positron excess, namely secondary production inside supernova remnants, and electron and positron production by pulsars and by DM annihilations. Assuming a secondary positron background and an additional astrophysical source, the new AMS-02 positron data allow to derive stringent limits on annihilating and decaying dark matter.