Fig. 2
Positron fraction as a function of the positron energy corresponding to the best-fit value of ⟨ σv ⟩ and DM mass mχ for 
(left) and 4τ annihilation channels (right), compared with AMS data (Accardo et al. 2014). The propagation parameters correspond to the MED model. The AMS-02 lepton spectrum (Weng et al. 2014) is used to derive the χ2.
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