ABSTRACT
In this author, the author have pointed out that already quark gases of different kinds, 6, 9 and 12 quarks manifest themselves even in the ground state of nuclei in which temperatures ∼ 0 and with small values of density. However for individual nucleons within the ground states of nuclei, the confinement size of quarks is ∼ 1fm. Furthermore, in high energy heavy ion collisions when a putative quark gluon plasma (QGP) state has been formed, the necessity of ensuring that no quarks or gluons leak out of the QGP implies the expectation for the confinement size to reach ∼ 10 - 20fm. Now local colour confinement, through understood phenomenologically, has been extremely difficult to describe within quantum chromodynamics (QCD). At low energies phenomenological models, based on some aspects of QCD, are doing reasonably well.
