  Minimum model calculations on the co-action of hole vanishing Lifshitz
transitions and correlation effects in ferropnictides are presented. The
calculations predict non-Fermi-liquid behaviour and huge mass enhancements of
the charge carriers at the Fermi level. The findings are compared with recent
ARPES experiments and with measurements of transport and thermal properties of
ferropnictides. The results from the calculation can be also applied to other
unconventional superconductors and question the traditional view of quantum
critical points.
