动力学破缺和普通自发破缺的手征SU(2)×SU(2)σ模型(Ⅱ)  

CHIRAL SU(2)×SU(2) δ MODEL WITH DYNAMICAL BREAKING AND SPONTANEOUS BREAKING(II)

作　　者：沈坤 裘忠平 

机构地区：[1]华中师范大学粒子物理研究所

出　　处：《高能物理与核物理》1989年第12期1130-1134,共5页High Energy Physics and Nuclear Physics

摘　　要：本文应用复合场的有效作用量,研究了同时具有动力学破缺和普通自发破缺情况下,SU(2)×SU(2)σ模型中π介子的质量谱;证明了在考虑了微扰效应后,π介子仍具有质量.在最低阶近似下,π介子的质量谱与我们以前的结论一致.In this letter the mass spectrum of π meson is investigated by means of the effective action for composite fields in chiral SU(2)×SU(2) σ model with dynamical breaking and ordinary spontaneous breaking.It is verified that π meson has a mass in all orders of perturbation theory, which agrees with the result of our earlier work in the lowes approximation.

关 键 词：动力学破缺 普通自发破缺 手征 

分 类 号：O572.331[理学—粒子物理与原子核物理]