Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-01-02
JHEP0707:008,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
67 pages, 26 figures, replaced with revised final version, to appear on JHEP
Scientific paper
10.1088/1126-6708/2007/07/008
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.
Coriano' Claudio
Irges Nikos
Morelli Simone
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