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Dynamical symmetry breaking for Weinberg-Salam model and restoration at finite temperature
An, Y; Wang, DF; Song, HS; An, Y , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
1996
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号26期号:1页码:103-110
摘要In this paper, we utilize Nambu-Jona-Lasinio (NJL) mechanism to discuss the dynamical symmetry breaking for Weinberg-Salam model. In the NJL mechanism the symmetry breaking not only is determined by the potential of scalar field V(phi) but also has important relation with condensate of the fermion pair [<(psi)over bar>psi]. We find that the coefficient of quadric term of scalar field mu(2) greater than or equal to 0 can still cause symmetry breaking by Virtue of (<(psi)over bar>psi) not equal 0, and the vacuum expected value of scalar field obeys (phi) = (<(psi)over bar>psi), i.e., the order parameter which causes phase transition is the condensate of fermion pair (<(psi)over bar>psi). We also discuss the restoration problem of SU(2) x U(1) gauge symmetry breaking by the NJL mechanism at high temperatures.
部门归属DALIAN UNIV TECHNOL,DEPT PHYS,DALIAN 116023,PEOPLES R CHINA; CCAST WORLD LAB,BEIJING 100080,PEOPLES R CHINA
关键词Jona-lasinio Model Nambu
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12605
专题理论物理所SCI论文
通讯作者An, Y , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
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An, Y,Wang, DF,Song, HS,et al. Dynamical symmetry breaking for Weinberg-Salam model and restoration at finite temperature[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,1996,26(1):103-110.
APA An, Y,Wang, DF,Song, HS,&An, Y , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA..(1996).Dynamical symmetry breaking for Weinberg-Salam model and restoration at finite temperature.COMMUNICATIONS IN THEORETICAL PHYSICS,26(1),103-110.
MLA An, Y,et al."Dynamical symmetry breaking for Weinberg-Salam model and restoration at finite temperature".COMMUNICATIONS IN THEORETICAL PHYSICS 26.1(1996):103-110.
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