  Walking technicolor (WTC) models predict the existence of heavy neutral
pseudo-Goldstone bosons (PGBs), whose masses are typically expected to be
larger than 100 GeV. In this paper, we investigate the production and decay of
these particles at the high energy e^+ e^- experiments, LEP II and NLC. We find
that, in WTC models, the production of neutral PGBs can be significantly
enhanced, by one or two orders of magnitude, with respect to the predictions of
traditional (QCD-like) TC models. The origin of such an enhancement is the
existence of several low energy TC scales, that are likely to appear in WTC
theories. This could allow the PGBs to be observed even at the energy and
luminosity of the LEP II experiment. At LEP II, the PGBs are expected to be
produced in the e^+ e^- ==> P \gamma channel, and, possibly, in the e^+ e^- ==>
P e^+ e^- channel, with a total rate that can be of the order of several tenths
per year. Due to the typical large values of PGB masses, the relative branching
ratios of PGB decays, in WTC theories, are different from those predicted in
traditional TC models. In particular, a large fraction of these decays can
occur in the P ==> \gamma \gamma channel. In considering the PGB production, at
LEP II, we find that, in most of the final states, the distinctive signatures
of WTC events should allow the Standard Model background to be reduced to a
negligible level. We also find that, at a 500 GeV NLC experiment, the
production of neutral PGBs can occur in several channels, and can be of the
order of 10^3 events per year. Instead, when we consider traditional TC models,
we find that no PGB are typically predicted to be observed, both at LEP II and
the NLC experiment.
