  Employing scalar QCD we study the gluon emission of heavy quarks created by
the interaction with light quarks considered as dynamical scattering centers.
We develop approximation formulas for the high energy limit and study when the
full calculation reaches this high energy limit. For zero quark masses and in
the high energy limit our model reproduces the Gunion-Bertsch results. We
justify why scalar QCD represents a good approximation to the full QCD approach
for the energy loss of heavy quarks. In the regime of accessible phenomenology
we observe that the emission at small transverse momentum (dead cone effect) is
less suppressed than originally suggested. We also investigate the influence of
a finite gluon mass on the discussed results.
