On the Color-Singlet States in Many-Quark Model with the su(4)-Algebraic Structure. III

TL;DR

This paper investigates phase transitions in a modified Bonn quark model, showing how density-dependent interactions lead to a transition from quark-triplet to quark-pair states, indicating color superconductivity.

Contribution

It introduces a density-dependent force strength in the many-quark model to analyze phase transitions between different color-singlet states.

Findings

Phase transition from quark-triplet to quark-pair state with increasing density

Density-dependent interaction influences phase structure

Identification of conditions for color superconductivity

Abstract

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.