Abstract
Ultrahigh energy cosmic rays create black holes in scenarios with extra dimensions and TeV-scale gravity. In particular, cosmic neutrinos will produce black holes deep in the atmosphere, initiating quasihorizontal showers far above the standard model rate. At the Auger Observatory, hundreds of black hole events may be observed, providing evidence for extra dimensions and the first opportunity for experimental study of microscopic black holes. If no black holes are found, the fundamental Planck scale must be above 2 TeV for any number of extra dimensions.
Highlights
If no black holes are found, the fundamental Planck scale must be above 2 TeV for any number of extra dimensions
Tiny black holes can be produced in particle collisions with centerof-mass energies above the Planck scale Mء, where they should be well described semiclassically and thermodynamically [1]
In models with extra dimensions, the fundamental Planck scale may be much lower. If this is the case, black hole production and evaporation might be observed in particle collisions [2,3]
Summary
Ultrahigh energy cosmic rays create black holes in scenarios with extra dimensions and TeV-scale gravity. Cosmic neutrinos will produce black holes deep in the atmosphere, initiating quasihorizontal showers far above the standard model rate.
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