Abstract
We argue that we may be able to sort out dark matter models in whichelectrons are generated through the annihilation and/or decay of darkmatter, by using a fact that the initial energy spectrum is reflectedin the cosmic-ray electron flux observed at the Earth even afterpropagation through the Galactic magnetic field. To illustrate ouridea we focus on three representative initial spectra: monochromatic,flat and double-peak ones. We find that those three casesresult in significantly different energy spectra, which may be probedby the Fermi satellite in operation or an up-coming cosmic-ray detectorsuch as CALET.
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