Some Remarks on Theories with Large Compact Dimensions and TeV-Scale Quantum Gravity

Abstract

We comment on some implications of theories with large compactification radii and TeV-scale quantum gravity. These include the behavior of high-energy gravitational scattering cross sections and consequences for ultra-high-energy cosmic rays and neutrino scattering, the question of how to generate naturally light neutrino masses, the issue of quark-lepton unification, the equivalence principle, and the cosmological constant.

28 pages, Latex

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• Extra dimensions and Strong Neutrino-Nucleon interactions above $10^{19}$ eV : Breaking the GZK Barrier
• Detecting Microscopic Black Holes with Neutrino Telescopes
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• Diphoton signals for Low Scale Gravity in Extra Dimensions
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• Electroweak instantons as a solution to the ultrahigh energy cosmic ray puzzle
• IceHEP High Energy Physics at the South Pole
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• Fermion Mass Hierarchies and Small Mixing Angles from Extra Dimensions
• Observing braneworld black holes
• Tests of Low Scale Gravity via Gauge Boson Pair Production in $\gamma \gamma$ Collisions
• Using Scalars to Probe Theories of Low Scale Quantum Gravity
• Experimental Probes of the Randall-Sundrum Infinite Extra Dimension
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• Effects of Gauge Interactions on Fermion Masses in Models with Fermion Wavefunctions Separated in Higher Dimensions
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• Estimative for the size of the compactification radius of a one extra dimension Universe
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