  We analyze the phenomenology of the top-pion and top-Higgs states in models
with strong top dynamics, and translate the present LHC searches for the
Standard Model Higgs into bounds on these scalar states. We explore the
possibility that the new state at a mass of approximately 125 GeV observed at
the LHC is consistent with a neutral pseudoscalar top-pion state. We
demonstrate that a neutral pseudoscalar top-pion can generate the diphoton
signal at the observed rate. However, the region of model parameter space where
this is the case does not correspond to classic topcolor-assisted technicolor
scenarios with degenerate charged and neutral top-pions and a top-Higgs mass of
order twice the top mass; rather, additional isospin violation would need to be
present and the top dynamics would be more akin to that in top seesaw models.
Moreover, the interpretation of the new state as a top-pion can be sustained
only if the ZZ (four-lepton) and WW (two-lepton plus missing energy) signatures
initially observed at the 3? level decline in significance as additional data
is accrued.

High Energy Physics - Phenomenology;High Energy Physics - Experiment