  The Fermi excitations in hot and dense quark-gluon plasma are studied in the
Feynman gauge using the temperature Green function technique. We find the four
well-separated branches for the case $m=0$ and establish the additional
splitting between them (the four different masses) when $m\ne 0$. The long
wavelength limit of these excitations is found in the general case of the
massive fermions at finite temperature and densities to give the exact one-loop
spectrum. Simultaneously the many known results are reproduces as its different
limits.

High Energy Physics - Phenomenology