On the color-singlet states in many-quark model with the su(4)-algebraic structure. III: Transition from the quark-triplet to the quark-pair phase

摘要

A phase structure and phase transitions are investigated in the modified Bonn quark model. The force strength, which represents the particle-hole type interaction, is devised so as to depend on the quark number, namely quark number density. As a result, it is shown that the phase transition from the quark-triplet state as a nucleon to the quark-pair state as a color-superconducting state occurs as the density increases.