Dark dimension, the swampland, and the origin of cosmic rays beyond the Greisen-Zatsepin-Kuzmin barrier
Luis A. Anchordoqui
Abstract
Very recently, it was pointed out that when basic ideas of the swampland program are combined with the cosmological hierarchy problem (i.e., the smallness of the dark energy in Planck units) and together are confronted to experiment lead to the prediction of the existence of a single extra-dimension (dubbed the dark dimension) with characteristic length-scale in the micron range. We propose a feasible test procedure to probe the dark dimension using the highest energy cosmic rays.
Topics & Concepts
PhysicsDark energyDimension (graph theory)Cosmic rayAstrophysicsHierarchyRange (aeronautics)Scale (ratio)CosmologyAstronomyTheoretical physicsQuantum mechanicsMarket economyEconomicsPure mathematicsMathematicsComposite materialMaterials scienceCosmology and Gravitation TheoriesAstrophysics and Cosmic PhenomenaDark Matter and Cosmic Phenomena