Decaying Asymmetric Dark Matter Relaxes the AMS-Fermi Tension

Understand

The first result of AMS-02 confirms the positron fraction excess observed by PAMELA, but the spectrum is somewhat softer than that of PAMELA.

• In the dark matter (DM) interpretation it brings a tension between AMS-02 and Fermi-LAT, which reported an excess of the electron plus positron flux.
• In this work we point out that the asymmetric cosmic ray from asymmetric dark matter (ADM) decay relaxes the tension.
• It is found that in the case of two-body decay a bosonic ADM around 2.4 TeV and decaying into $\mu^-\tau^+$ can significantly improve the fits.