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arXiv · 1110.6626

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

Daniele Gaggero·Dario Grasso
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Abstract

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.

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Daniele Gaggero, Dario Grasso. 2011-10-30. CR electrons and positrons: what we have learned in the latest three years and future perspectives. https://doi.org/10.1142/9789814405072_0036

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