II. ~1S_0 PAIRING CORRELATION IN SYMMETRIC NUCLEAR MATTER WITH DEBYE SCREENING EFFECTS

摘要

The ~1S_0 pairing of symmetric nuclear matter is discussed in the frame work of relativistic nuclear theory with Dyson-Schwinger equations(DSEs). The in-medium nucleon and meson propagators are treated in a more self-consistent way through meson polarizations. The screening effects on mesons due to in-medium nucleon excitation are found to reduce the ~1S_0 pairing gap and shift remarkably the gap peak to low density region.