  We present results of searches for technirho, techniomega, and Z' particles,
using the decay channels technirho, techniomega, Z' -> e+e-. The search is
based on 124.8 pb-1 of data collected by the D0 detector at the Fermilab
Tevatron during 1992-1996. In the absence of a signal, we set 95% C.L. upper
limits on the cross sections for the processes p pbar -> technirho,
techniomega, Z' -> e+e- as a function of the mass of the decaying particle. For
certain model parameters, we exclude the existence of degenerate technirho and
techniomega states with masses below about 200 GeV. We exclude a Z' with mass
below 670 GeV, assuming that it has the same couplings to fermions as the Z
boson.
