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Anomalies via dimensional regularization
journal contributionposted on 2023-05-18, 05:26 authored by Akyeampong, DA, Robert DelbourgoRobert Delbourgo
Anomalous Ward identities arise when the Lagrangian in 2l-dimensional space-time is not invariant under the symmetry transformation in question withl arbitrary. (The anomalous symmetry-breaking terms have associated a factor 2l–4 and disappear at the classical level in four dimensions.) In particular, the axial anomaly is connected with the chiral breaking due to the fermion kinetic energy and the canonical trace anomaly is a consequence of dilatation non-invariance of any interaction.
Publication titleNuovo Cimento A
Department/SchoolSchool of Natural Sciences
Place of publicationItaly