Hints of a Charge Asymmetry in the Electron and Positron Cosmic-Ray Excesses

Understand

By combining the recent data from AMS-02 with those from Fermi-LAT, we show the emergence of a charge asymmetry in the electron and positron cosmic-ray excesses, slightly favoring the electron component.

• Astrophysical and dark matter inspired models introduced to explain the observed excesses can be classified according to their prediction for the charge asymmetry and its energy dependence.
• Future data confirming the presence of a charge asymmetry, would imply that an asymmetric production mechanism is at play.