Based on a general analysis of Green functions in the real-time thermal field theory, we have proven that the four-point amputated functions in an NJL model in the fermion bubble diagram approximation behave like usua...
Supported by the National 973 Program under Grant No.2014CB921403;the National Key Research and Development Program under Grant No.2016YFA0301201;the National Natural Science Foundation of China under Grant Nos.11421063 and 11534002
Spontaneous symmetry breaking is related to the appearance of emergent phenomena, while a non-vanishing order parameter has been viewed as the sign of turning into such symmetry-breaking phase. We study the spontaneou...
Generation of neutrino mass in SO(4) model is proposed here. The algebraic structure of SO (4) is same as to that ofSU(2)L x SU(2)R. It is shown that the spontaneous symmetry breaking results three massive as ...