Abstract
The aim of this work is to explain the behavior of quarks state confinement, and asymptotic freedom depending on the quantum chromodynamic theory QCD . The photons emission are very important tool to probing the quark gluon interaction at nuclear collisions for high energy. The effective coupling constant have been estimated using a first leading approximation for renormalization equation .The effective coupling constant αesc(Peff) estimated as a function of effective transfer momentum and temperature. The critical properties have been studied depending on the QCD theory to analysis the asymptotic freedom and confinement behavior at high temperatures. This properties is tested with results of the QCD theory.
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