Very recently , schiller and muether at tubingen university suggested a new decomposition approach of the dbhf g matrix , and used to calculate the nucleon self - energy . they , sepa rate the g matrix into a bare nucleon - nucleon interaction v and correction term a g . the projection method is only applied to the correlation term a g , which is parameterized by four pseudo - mesons . then the nucleon self - energy in the dbhf can be calculated with the g matrix in the relativistic hartree - fock approximation 裸相互作用部分，即单玻色子交换势v对核子dirac自能结构的贡献可以通过相对论hartree - fock方法得到，只把关联部分用投影方法处理，并参数化为四种具有无穷大质量赝介子的交换，耦合常数与质量的比值是常数，从而关联部分g对核子自能的贡献也可以通过相对论hartree - fock方法求得。
