The existence of multiple energy scales is regarded as a signature of the
Kondo breakdown mechanism for explaining the quantum critical behavior of
certain heavy fermion compounds, like YbRh2Si2. The nature of the
intermediate state between the heavy Fermi liquid and the quantum critical
region, however, remains elusive. In this study we suggest an incoherent
heavy-fermion scenario, where inelastic scattering with novel soft modes of the
dynamical exponent z=3 gives rise to non-Fermi liquid physics for
thermodynamics and transport despite the formation of the heavy-fermion band.
We discuss a crossover from z=3 to z=1 for quantum phase fluctuations