Black hole, string ball, and p-brane production at hadronic   supercolliders
  In models of large extra dimensions, the string and Planck scales become accessible at future colliders. When the energy scale is above the string scale or Planck scale a number of interesting phenomena occur, namely, production of stringy states, p-branes, string balls, black hole, etc. In this work, we systematically study the production cross sections of black holes, string balls, and p-branes at hadronic supercolliders. We also discuss their signatures. At the energy scale between the string scale M_s and M_s/g_s^2, where g_s is the string coupling, the production is dominated by string balls, while beyond M_s/g_s^2 it is dominated by black holes. The production of a p-brane is only comparable to black holes when the p-brane wraps entirely on small extra dimensions. Rough estimates on the sensitivity reaches on the fundamental Planck scale M_D are also obtained, based on the number of raw events. 
Kingman Cheung (NCTS)