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On the validity of ward identities

Authors
  • Stichel, P.
Publication Date
Jan 01, 1970
Identifiers
DOI: 10.1007/BF01649446
OAI: oai:inspirehep.net:65410
Source
INSPIRE-HEP
Keywords
License
Unknown
External links

Abstract

Ward identities for matrix elements of covariant two-point time-ordered operators in the presence of an arbitrary number of subtractions are investigated. Neither the existence of naiveT-products nor the existence of equal-time commutators between current densities will be assumed. It is shown by means of the Jost-Lehmann-Dyson representation thatT*-products can always be defined such that normal Ward identities with respect to one current are valid. The simultaneous validity of normal Ward identities with respect to two currents requires a relation between equal-time charge-current commutators.

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