Path-Integral Measure for Gauge-Invariant Fermion Theories
- 30 April 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 42 (18) , 1195-1198
- https://doi.org/10.1103/physrevlett.42.1195
Abstract
It is shown that the path-integral measure for gauge-invariant fermion theories is not invariant under the transformation and the Jacobian gives rise to an extra phase factor corresponding to the Adler-Bell-Jackiw anomaly. The derivation of "anomalous" Ward-Takahashi identities by means of the variational derivative can thus be made consistent in the path-integral formalism.
Keywords
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