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Advanced Topics in Quantum Field Theory by M. Shifman

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8

Chiral anomaly

A clash between global chiral symmetries and gauge symmetry leads to anomalies. – External and internal anomalies. – Two faces of the anomaly. – The power of the ’t Hooft matching. – A brief encounter with the scale anomaly.

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33 Chiral anomaly in the Schwinger model

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Our first encounter with the chiral anomalies in gauge theories occurred in Chapter 5. We have invoked them, in a pragmatic way, more than once. The current chapter is designed to explain the conceptual issues behind the anomalies. The questions to be asked are ...

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