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