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Anomalies in Quantum Field Theory$
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Reinhold A. Bertlmann

Print publication date: 2000

Print ISBN-13: 9780198507628

Published to Oxford Scholarship Online: January 2010

DOI: 10.1093/acprof:oso/9780198507628.001.0001

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Consistent anomaly

Consistent anomaly

Chapter:
(p.342) 8 Consistent anomaly
Source:
Anomalies in Quantum Field Theory
Author(s):

Reinhold A. Bertlmann

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198507628.003.0008

Chapter 4 introduced the anomaly as the breakdown of a classical conservation law. This chapter investigates the anomaly further in light of gauge transformations. Section 8.1 introduces an infinitestimal gauge operator, generalize to a BRS operator, and find its representation in the functional space of the gauge potentials and Faddeev–Popov ghosts. Section 8.2 discusses the anomalous Ward identity in terms of functional derivatives and subsequently derives the equation which determines the anomaly — the Wess–Zumino consistency condition — in the gauge transformation variant and in the BRS variant. Section 8.3 presents the different aspects of the anomaly equation, such as the algebra-, the cocycle-, and the cohomology aspects.

Keywords:   gauge transformations, Faddeev–Popov ghosts, Wess–Zumino consistency condition

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