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Il Nuovo Cimento A (1965-1970)

, Volume 95, Issue 3, pp 229–237 | Cite as

Goldstone mode of chiral symmetry in quantum chromodynamics

  • R. Acharya
  • P. Narayana Swamy
Article

Summary

We examine the Dyson qeuation for the quark propagator and the Ward identity for the quark-gluon vertex function in the framework of the gauge technique with the object of investigating broken chiral symmetry in quantum chromodynamics with massless quarks. We find that the chiral-symmetric Wigner-Weyl solution is realized only when the transverse part of the quark-gluon vertex is suppressed; its presence necessarily requires the spontaneous breakdown of chiral symmetry.

PACS

11.30.Rd Chiral symmetries 

PACS

12.35.Cn General properties of quantum chromodynamics (dynamics confinement, etc.) 

Riassunto

Si esamina l’equazione di Dyson per il propagatore di quark e l’identità di Ward per la funzione di vertice quark-gluone nell’ambito della tecnica di gauge con l’obiettivo di studiare la simmetria chirale rotta nella cromodinamica quantistica con quark privi di massa. Si trova che la soluzione di Wigner-Weyl a simmetria chirale si ottiene solo quando la parte trasversale del vertice quark-gluone è soppressa; la sua presenza richiede neoessariamente la rottura spontanea di simmetria chirale.

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Copyright information

© Società Italiana di Fisica 1986

Authors and Affiliations

  • R. Acharya
    • 1
  • P. Narayana Swamy
    • 2
  1. 1.Physics DepartmentArizona State UniversityTempe
  2. 2.Physics DepartmentSouthern Illinois UniversityEdwardsville

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