  Tracks events at the IceCube Observatory are characterized by an energetic
muon crossing several kilometers before decaying. Such muons are dominantly
produced in charged current (CC) muon neutrino - hadron interactions. However,
muons are also produced through the $W$ - boson production and in the decay of
tau leptons and heavy mesons created in neutral and charged current
interactions induced by all neutrino flavors. In this paper, we investigate the
contribution of these subleading channels to events characterized as tracks at
the IceCube. Our results indicate that these channels correspond to a non -
negligible fraction of the HESE track events. In addition, we show that its
contributions are concentrated in muons that are less energetic than those
arising from muonic neutrino CC interactions for the same visible energies of
the process. Finally, we investigate the impact of these additional channels on
the description of the astrophysical neutrino flux, and we find that the
inclusion of these subleading processes are important in determining the
parameters of the astrophysical neutrino flux.
