Nota de FísicaPublicado
Analysis of Chiral Symmetry Breaking Mechanism
Xin-Heng Guo; Tao Huang
1997
Dados da publicação
- Autores
- Xin-Heng Guo; Tao Huang
- Tipo
- Nota de Física
- Status
- Publicado
- Data de publicação
- 1997
- Descrição
- The renormalization group invariant quark condensate <math>\hat{\mu}\,\!</math> is determined both from the consistent equation for quark condensate in the chiral limit and from the Schwinger-Dyson (SD) equation improved by the intermediate range QCD force singular like <math>\delta(q)\,\!</math> which is associated with the gluon condensate. The solutions of <math>\hat{\mu}\,\!</math> in these two equations are consistent. We also obtain the critical strong coupling constant <math>\alpha_{c}\,\!</math> above which chiral symmetry breaks in these two approaches. The nonperturbative kernel of the SD equation makes <math>\alpha_{c}\,\!</math> smaller and <math>\hat{\mu}\,\!</math> bigger. An intuitive picture of the condensation above <math>\alpha_{c}\,\!</math> is discussed. In addition, with the help of the Slavnov-Taylor-Ward (STW) identity we derive the equations for the nonperturbative quark propagator from the SD equation in the presence of the intermediate range force and find that the intermediate-range force is also responsible for dynamical chiral symmetry breaking.
- Ano
- 1997
- Número
- CBPF-NF-045/97
- Vínculo com tese
- Não
- Vínculo com bolsa
- Não