Perturbation Lagrangian Theory for Dirac Fields-Ward-Takahashi Identity and Current Algebra
Journal Article
·
· Physical Review. D, Particles Fields
- Univ. of Pittsburgh, PA (United States)
In a class of Lagrangian field theories for Dirac spin-½ particles, the Bogoliubov-Parasiuk-Hepp renormalization scheme provides a proof of the operator forms of Euler-Lagrange equations of motion, Noether's theorem, and Ward-Takahashi identities. Further, time-ordered products for some derivatives of Dirac fields can only be defined with special care in terms of Feynman graphs. Current-algebra Ward-Takahashi identities are obtained if $$\mathscr{L}$$derivative is invariant under the algebra; however, Schwinger terms are absent from these identities.
- Research Organization:
- Univ. of Pittsburgh, PA (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- NSA Number:
- NSA-26-032218
- OSTI ID:
- 4646349
- Report Number(s):
- NYO--3829-89
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 6; ISSN 0556-2821
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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