Temperature dependence of the effective bag constant and the radius of a nucleon in the global color symmetry model of QCD

2010/08/20 by Yuan Mo, Mo Yuan, Si-xue Qin +2
Physics and Astronomy · #Chiral symmetry breaking #Deconfinement #Gluon #High-Energy Particle Collisions Research #Mathematical physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quark #RADIUS #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevc.82.025206

published as Phys.Rev.C82:025206,2010 · 10 pages, 9 figures

openalex publication_date 2010/08/20 · arxiv created 2010/09/17 · arxiv updated 2011/10/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the temperature dependence of the effective bag constant, the mass, and the radius of a nucleon in the formalism of the simple global color symmetry model in the Dyson-Schwinger equation approach of QCD with a Gaussian-type effective gluon propagator. We obtain that, as the temperature is lower than a critical value, the effective bag constant and the mass decrease and the radius increases with the temperature increasing. As the critical temperature is reached, the effective bag constant and the mass vanish and the radius tends to infinity. At the same time, the chiral quark condensate disappears. These phenomena indicate that the deconfinement and the chiral symmetry restoration phase transitions can take place at high temperature. The dependence of the critical temperature on the interaction strength parameter in the effective gluon propagator of the approach is given.

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