• Corpus ID: 15338881

Anomalies in quantum field theory: Properties and characterization

@article{Kraus2002AnomaliesIQ,
  title={Anomalies in quantum field theory: Properties and characterization},
  author={Elisabeth Kraus},
  journal={arXiv: High Energy Physics - Theory},
  year={2002}
}

• E. Kraus
• Published 11 November 2002
• Physics
• arXiv: High Energy Physics - Theory

We consider the Adler-Bardeen anomaly of the U(1) axial current in abelian and non-abelian gauge theories and present its algebraic characterization as well as an explicit evaluation proving regularization scheme independence of the anomaly. By extending the gauge coupling to an external space-time dependent field we get a unique definition for the quantum corrections of the topological term. It also implies a simple proof of the non-renormalization theorem of the Adler-Bardeen anomaly. We consider local gauge couplings in supersymmetric theories and find that there the renormalization of the gauge coupling is determined by the topological term in all loop orders except for one loop. It is shown that in one-loop order the quantum corrections to the topological term induce an anomalous breaking of supersymmetry, which is characterized by similar properties as the Adler-Bardeen anomaly.