Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-17
Phys.Rev.C82:025206,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 9 figures
Scientific paper
10.1103/PhysRevC.82.025206
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.
Liu Yu-Xin
Mo Yuan
Qin Si-xue
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