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We demonstrate, that the main universal features of the low temperatureexperimental $H-T$ phase diagram of CeCoIn5 and other heavy-fermion metals canbe well explained using Landau paradigm of quasiparticles. The main point ofour theory is that above quasiparticles form so-called fermion-condensatestate, achieved by a fermion condensation quantum phase transition (FCQPT).When a heavy fermion liquid undergoes FCQPT, the fluctuations accompanyingabove quantum critical point are strongly suppressed and cannot destroy thequasiparticles. The comparison of our theoretical results with experimentaldata on CeCoIn5 have shown that the electronic system of above substanceprovides a unique opportunity to study the relationship between quasiparticlesproperties and non-Fermi liquid behavior.Comment: 7 pages, 1 figure. arXiv admin note: substantial text overlap with  arXiv:cond-mat/060260

Quasiparticles and quantum phase transition in universal low-temperature properties of heavy-fermion metals