Fermi Excitations in Hot and Dense Quark-Gluon Plasma

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.