Anomalies and gravity

Details Anomalies and gravity Anomalies and gravity

2006-05-16

arxiv.org/abs/hep-th/0605159v1

AIP Conf.Proc.857B:246-257,2006

Physics

High Energy Physics

High Energy Physics - Theory

11 pages

Scientific paper

10.1063/1.2359409

Anomalies in Yang-Mills type gauge theories of gravity are reviewed. Particular attention is paid to the relation between the Dirac spin, the axial current j_5 and the non-covariant gauge spin C. Using diagrammatic techniques, we show that only generalizations of the U(1)- Pontrjagin four--form F^ F= dC arise in the chiral anomaly, even when coupled to gravity. Implications for Ashtekar's canonical approach to quantum gravity are discussed.

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