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Stuckelberg Axions and the Effective Action of Anomalous Abelian Models 1. A unitarity analysis of the Higgs-axion mixing

Authors
  • Coriano, Claudio
  • Irges, Nikos
  • Morelli, Simone
Type
Published Article
Publication Date
Jun 23, 2007
Submission Date
Jan 02, 2007
Identifiers
DOI: 10.1088/1126-6708/2007/07/008
arXiv ID: hep-ph/0701010
Source
arXiv
License
Unknown
External links

Abstract

We analyze the quantum consistency of anomalous abelian models and of their effective field theories, rendered anomaly-free by a Wess-Zumino term, in the case of multiple abelian symmetries. These models involve the combined Higgs-Stuckelberg mechanism and predict a pseudoscalar axion-like field that mixes with the goldstones of the ordinary Higgs sector. We focus our study on the issue of unitarity of these models both before and after spontaneous symmetry breaking and detail the set of Ward identities and the organization of the loop expansion in the effective theory. The analysis is performed on simple models where we show, in general, the emergence of new effective vertices determined by certain anomalous interactions.

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