Topological physics of little Higgs bosons

Topological interactions will generally occur in composite Higgs or little Higgs theories, extra-dimensional gauge theories in which $A_5$ plays the role of a Higgs boson, and amongst the (pseudo) Nambu-Goldstone bosons pNGB’s of technicolor. This phenomenon arises from the chiral and anomaly structure of the underlying UV completion theory, and/or through chiral delocalization in higher dimensions. These effects are described by a full Wess-Zumino-Witten term involving gauge fields and pNGB’s. We give a general discussion of these interactions, some of which may have novel signatures at future colliders, such as the LHC and ILC.