EFFECTIVE-MASS OF OMEGA-MESON AND NN-OMEGA INTERACTION AT FINITE-TEMPERATURE AND DENSITY

By means of the thermofield dynamical theory, the effective mass of om ega meson is calculated by summing the bubble diagrams. It is found th at the formula for the effective mass of the rho meson can also be use d to describe the omega meson in the low density region, but the param eter n and the critical temperature T-c depend on the density. The tem perature and density dependence of one omega exchange potential of nuc leon-nucleon interaction are given. The conjecture of Brown and Rho ab out the effective masses of mesons is discussed.