Summary
Conditions for the validity of (a weak version of) the Adler-Bardeen theorem for non-Abelian gauge theories are obtained. Its validity ensures that those theories in which the coefficient of the triangle anomaly vanishes at the one-loop level are anomaly free and therefore they are renormalizable and unitary. This result is based on the derivation of Slavnov-Taylor identities modified by the presence of anomalous terms and on a renormalization-group-like equation for the anomaly coefficient. In the derivation, the dimensional regularization scheme has been followed.
Riassunto
Si presentano le condizioni per la validità di una versione debole del teorema di Adler-Bardeen per teorie di gauge non abeliane. La sua validità assicura che quelle teorie in cui il coefficiente dell’anomalia triangolare si annulla a livello di un’ansa sono libere di anomalie e quindi sono rinormalizzabili ed unitarie. Tale risultato si basa sulla derivazione di identità di Slavnov-Taylor modificate dalla presenza di anomalie e su un’equazione tipo gruppo di rinormalizzazione per il coefficiente dell’anomalia nell’ambito della regolarizzazione dimensionale.
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Costa, G., Marinucci, T., Tonin, M. et al. Non-abelian gauge theories and triangle anomalies. Nuov Cim A 38, 373–412 (1977). https://doi.org/10.1007/BF02730012
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DOI: https://doi.org/10.1007/BF02730012