The dark dimension, the Swampland, and the origin of cosmic rays beyond the GZK barrier

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.

Matching version to be published in PRD, minor typo in fiducial values adopted in parametric Eq. (4) corrected, conclusions unchanged

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• The Swampland: Introduction and Review
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Cited by in corpus (11)

• Aspects of the Dark Dimension in Cosmology
• Minimal Black Holes and Species Thermodynamics
• From infinite to infinitesimal: Using the Universe as a dataset to probe Casimir corrections to the vacuum energy from fields inhabiting the dark dimension
• Fuzzy Dark Matter and the Dark Dimension
• Curious case of the maximum rigidity distribution of cosmic-ray accelerators
• Probing the Dark Dimension with Auger data
• Bulk Black Hole Dark Matter
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Confinement from Distance in Metric Space and its Relation to Cosmological Constant
• A trial to understand the supersymmetry relations through extension of the second quantized fermion and boson fields, either to strings or to odd dimensional spaces
• Data-driven analysis for understanding ultrahigh energy cosmic ray source spectra