Abstract
An effective Hamiltonian including current-current coupling from the global color symmetry model is derived. Retardation effects are introduced by the factor , instead of in the correlation kernel, from which the retardation gap equation with coupling in the vacuum is obtained, condensations of different retardation parameters with or without the term are calculated. The results show the effects of retardation,and indicate that the typical value of is about at reasonable value of condensation. And while taking typical value of of, the condensation is about 13% larger than that with no retardation effect. With the terms, the condensation is about 17% larger than that without it for all values of the parameter . This shows that the retardation effects and the terms are important for further studying in the Iow-energy region.
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