Indirect detection of Kaluza–Klein dark matter from latticized universal dimensions

Abstract

We consider Kaluza–Klein dark matter from latticized universal dimensions. We investigatetwo different lattice models, where the models differ in the choice of boundary conditions.The models reproduce relevant features of the continuum model for Kaluza–Klein darkmatter. For the model with simple boundary conditions, this is the case even for a modelwith only a few lattice sites. We study the effects of the latticization on the differential fluxof positrons from annihilation of Kaluza–Klein dark matter in the galactic halo.We find that for different choices of the compactification radius, the differentialpositron flux rapidly converges to the continuum model results as a function ofthe number of lattice sites. In addition, we consider the prospects for upcomingspace-based experiments such as PAMELA and AMS-02 to probe the latticization effect.