  In the following work, we compute the positron production from branon dark
matter annihilations in order to constrain extra-dimensional theories. By
having assumed that the positron fraction measured by AMS-02 is well explained
just with astrophysical sources, exclusion diagrams for the branon mass and the
tension of the brane, the two parameters characterising the branon
phenomenology become possible. Our analysis has been performed for a minimal
and a medium diffusion model in one extra dimension for both pseudo-isothermal
and Navarro Frenck White dark matter haloes. Our constraints in the dark matter
mass candidate range between 200 GeV and 100 TeV. Combined with previous
cosmological analyses and experimental data in colliders, it allows us to set
bounds on the parameter space of branons. In particular, we have discarded
regions in the mass-tension diagram up to a branon mass of 28 TeV for the
pseudo-Isothermal prole and minimal diffusion, and 63 TeV for the
Navarro-Frenck-White profile and medium diffusion.
