  Particle collisions with center-of-mass energy larger than the fundamental
gravitational scale can generate non perturbative gravitational objects such as
black holes and branes. In models with large extra dimensions, the fundamental
gravitational scale may be around a TeV, making it possible for next generation
particle colliders and ultra-high energy cosmic rays to produce such non
perturbative gravitational objects. The decay of TeV gravitational objects is
significantly different from standard model processes such that probes of these
new ideas are within reach. We study the differences between standard model and
TeV gravity interactions in extensive air showers (EAS) generated by ultra-high
energy cosmic neutrinos. We show that discriminating TeV gravity from standard
model interactions is generally difficult, but not impossible given a few
unique signatures.

Astrophysics;General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology;High Energy Physics - Theory