MASSES OF HADRONS AND NUCLEON-NUCLEON INTERACTION AT FINITE-TEMPERATURE AND DENSITY IN A QUANTUM HADRODYNAMICS MODEL

The effective masses and the screening masses of hadrons at finite tem perature and density for the quantum hadrodynamics two (QHD-II) model have been investigated under the one-loop approximation. The nucleon-n ucleon interaction through pion, sigma, omega, and rho mesons exchange in hot nuclear matter is given. We have found that the potential well of the nucleon-nucleon interaction becomes shallow as the temperature and/or density increases. At a critical temperature and/or a critical density, the potential well disappears.