Heavy Charged Lepton Production In Superstring Inspired E6 Models
  We investigate the possibility of studying E$_6$ phenomenology at high energy hadron colliders. The production of heavy leptons pairs {\it via} a gluon-gluon fusion mechanism is discussed. An enhancement in the parton level cross-section is expected due to the heavy (s)fermion loops which couple to the gluons. 
M.M. Boyce, M.A. Doncheski, H. K\"onig