  We demonstrate, that the main universal features of the low temperature
experimental $H-T$ phase diagram of CeCoIn5 and other heavy-fermion metals can
be well explained using Landau paradigm of quasiparticles. The main point of
our theory is that above quasiparticles form so-called fermion-condensate
state, achieved by a fermion condensation quantum phase transition (FCQPT).
When a heavy fermion liquid undergoes FCQPT, the fluctuations accompanying
above quantum critical point are strongly suppressed and cannot destroy the
quasiparticles. The comparison of our theoretical results with experimental
data on CeCoIn5 have shown that the electronic system of above substance
provides a unique opportunity to study the relationship between quasiparticles
properties and non-Fermi liquid behavior.
