Windows over a New Low Energy Axion

Abstract

We outline some general features of possible extensions of the Standard Model that include anomalous U(1) gauge symmetries, a certain number of axions and their mixings with the CP-odd Higgs sector. As previously shown, after the mixing one of the axions becomes a physical pseudoscalar (the axi-Higgs) that can take the role of a modified QCD axion. It can be driven to be very light by the same non-perturbative effects that are held responsible for the solution of the strong CP-problem. At the same time the axi-Higgs has a sizeable gauge interaction, which is not allowed to the Peccei-Quinn axion, possibly explaining the PVLAS results. We point out that the Wess-Zumino term, typical of these models, can be both interpreted as an anomaly inflow from higher dimensional theories (second window) but also as a result of partial decoupling of an extra Higgs sector (and of a fermion) that leaves behind an effective anomalous abelian theory (first window) in a broken Stückelberg phase. The possibility that the axi-Higgs can be heavy, of the order of the Higgs mass or larger, however, can't be excluded. The potentialities for the discovery of this particle and of anomaly effects in the neutral current sector at the LHC are briefly discussed in the context of a superstring inspired model (second window), but with results that remain valid also if any of the two possibilities is realized in Nature.

17 pages, 8 Figs, replaced with revised final version, to appear on Phys.Lett. B

References in corpus (10)

• Grand unification and heavy axion
• Anomalies, Anomalous U(1)'s and generalized Chern-Simons terms
• Aspects of the Stueckelberg Extension
• Signatures of axion-like particles in the spectra of TeV gamma-ray sources
• Evading Astrophysical Constraints on Axion-Like Particles
• On the Effective Theory of Low Scale Orientifold String Vacua
• Localized anomalies in orbifold gauge theories
• Anomalies, Chern-Simons Terms and Chiral Delocalization in Extra Dimensions
• Axion Searches
• Dimensional Deconstruction and Wess-Zumino-Witten Terms

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