1110.6626 (Daniele Gaggero et al.)

CR electrons and positrons: what we have learned in the latest three years and future perspectives    [PDF]

Daniele Gaggero, Dario Grasso

After the PAMELA finding of an increasing positron fraction above 10 GeV, the experimental evidence for the presence of a new electron and positron spectral component in the cosmic ray zoo has been recently confirmed by Fermi-LAT. We show that a simple phenomenological model which assumes the presence of a primary electron and positron extra component allows a consistent description of all available data sets. We then describe the most relevant astrophysical uncertainties which still prevent to determine the electron+positron source properties from those data and the perspectives of forthcoming experiments.

View original: http://arxiv.org/abs/1110.6626