Influence of self-interaction of sigma meson to the equation of state of nuclear matter

In the relativistic sigma-omega model, the influence of the parameters in s elf-interaction of sigma meson to the equation of state of normal nuclear m atter, especially, to incompressibility, effective mass, and coupling const ants, is studied in detail. We find that these parameters have an intense r elationship to the property of nuclear matter. At the same time, we study t he relation between the binding energy and pressure of relativistic Delta - resonance nuclear matter and temperature using above results in the relativ istic sigma-omega-pi model, and it is interesting to compare it to our prio r work. In all these studies, the vacuum fluctuation on nucleon, Delta -iso bar, and sigma meson is considered.