  We present a dynamical mean-field study of dynamical susceptibilities in
two-band Hubbard model. Varying the model parameters we analyze the
two-particle excitations in the normal as well as in the ordered phase, an
excitonic condensate. The two-particle DMFT spectra in the ordered phase reveal
the gapless Goldstone modes arising from spontaneous breaking of continuous
symmetries. We also observe gapped Higgs mode, characterized by vanishing of
the gap at the phase boundary. Qualitative changes observed in the spin
susceptibility can be used as an experimental probe to identify the excitonic
condensation.
