Abstract

The quark-gluon plasma is a novel state of matter in which quarks are no longer confined to bound states such as baryons and mesons. the freezing of quark–gluon deconfined degrees of freedom is the essential ingredient in determining the conditions in a transition between phases that has time to develop into equilibrium. The degree of freedom in the confined hadronic matter phase and the deconfned phase the QGP is important in the study of phase transition in the early universe. It is calculated according to the strong coupling constant. But in the present work, we try to figure out the effect of the running coupling constant in the calculation of the degree of freedom, the latent heat and the critical pressure in the confined-deconfined phase of matter.

Key words: Degree of freedom, confined phase (hadronic matter), deconfined phase (QGP), strong coupling constant, running coupling constant.