More About Discrete Gauge Anomalies

Preprint

8 October 1992

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/9210211

Abstract

I discuss and extend several results concerning the cancellation of discrete gauge anomalies. I show how heavy fermions do not decouple in the presence of discrete gauge anomalies. As a consequence, in general, cancellation of discrete gauge anomalies cannot be described merely in terms of low energy operators involving only the light fermions. I also discuss cancellation of discrete gauge anomalies through a discrete version of the Green-Schwarz (GS) mechanism as well as the possibility of discrete gauge R-symmetries and their anomalies. Finally, some phenomenological applications are discussed. This includes symmetries guaranteeing absence of FCNC in two-Higgs models and generalized matter parities stabilizing the proton in the supersymmetric standard model. In the presence of a discrete GS mechanism or/and gauge R-symmetries, new possibilities for anomaly free such symmetries are found.

Keywords

All Related Versions

Version 1, 1992-10-05, ArXiv
Version 2, 1992-10-08, ArXiv
Published version: Nuclear Physics B, 398 (2), 301.

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