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Based on the Pomeranchuk theorem, one constructs the $\delta(s)$ parameter tomeasure the difference between experimental data for the particle-particle andparticle-antiparticle total cross section at the same energy. The experimentaldata for the proton-proton and proton-antiproton total cross section were usedto show that, at the same energy, this parameter tends to zero as the collisionenergy grows. Furthermore, one assumes a classical description of the totalcross section, dividing it into a finite number of non-interacting disjointcells, each one containing a quark-antiquark pair subject to the confinementpotential. Near the minimum of the total cross section, one associates$\delta(s)$ with the entropy generated by these cells, analogous to the XYmodel. Using both the Quigg-Rosner and Cornell confinement potentials andneglecting other energy contributions, one can calculate the internal energy ofthe hadron. One obtains that both the entropy and internal energy possess thesame logarithmic dependence on the spatial separation between the pairs in thecell. The Helmholtz free energy is used to estimate the transition temperature,which is far from the temperature widely related to the Quark-Gluon Plasma.

Chiral Symmetry in the Confinement Phase of QCD