The Effect of Retardation on the Spontaneous Breaking of Chiral Symmetry in GCM  

作　　者：YANG Sheng-Dong ZHAI Chen-Yang ZHOU Zhi-Ning YANG Ze-Sen 

机构地区：[1]Department of Physics,Peking University,Beijing 100871,China Department of Technical Physics,Peking University,Beijing 100871,China Department of Physics,Peking University,Beijing 100871,China Department of Physics,Peking University,Beijing 100871,China

出　　处：《Communications in Theoretical Physics》2001年第11期589-592,共4页理论物理通讯（英文版）

基　　金：国家自然科学基金

摘　　要：An effective Hamiltonian including current-current coupling from the global color symmetry model is -R2 2derived.Retardation effects are introduced by the factor ( R/ ) e ,instead of δ (r) in the correlation kernel,from which the retardation gap equation with α-α coupling in the 3po vacuum is obtained,qq condensations of different retardation parameters R with or without the α-α term are calculated.The results show the effects of retardation,and indicate that the typical value of R is about 2 fm-1 at reasonable value of qq condensation.And while taking typical value 1 fm-1 of R,the condensation <qq>1/3 is about 13% larger than that with no retardation effect.With the α-αterms,the condensation (qq) 1/3 is about 17%o larger than that without it for all values of the parameter R.This shows that the retardation effects and the α-α terms are important for further studying in the Iow-energy region.

关 键 词：EFFECT of retardation condensation spontaneous BREAKING of chiral symmetry 

分 类 号：O4[理学—物理]