  Ultradense dark matter halos (UDMHs) are high concentrations of dark matter,
assumed to have formed deep in the radiation-dominated era from amplified
primordial perturbations. In this work we improve the previous works for the
calculation of UDMH abundance by elaborating on the formation process of these
halos by including various physical and geometrical modifications in the
analysis. In particular, we investigate the impact of angular momentum,
dynamical friction and triaxial collapse on the predicted mass functions for
UDMHs. We perform the calculations for four primordial power spectra with
different amplified features that allow for primordial black hole and UDHM
formation in wide and narrow mass ranges. We also apply this analysis in the
context of two possible scenarios for dark matter: the single-component and the
multi-component. We find that the abundance of UDMHs is prominently enhanced in
the presence of these more realistic mass functions.
