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Pseudo-axions in little Higgs models
Physical Review D
Little Higgs models have an enlarged global symmetry which makes the Higgs boson a pseudo-Goldstone boson. This symmetry typically contains spontaneously broken U(1) subgroups which provide light electroweak-singlet pseudoscalars. Unless such particles are absorbed as the longitudinal component of Z' states, they appear as pseudoscalars in the physical spectrum at the electroweak scale. We outline their significant impact on Little Higgs phenomenology and analyze a few possible signatures atdoi:10.1103/physrevd.71.015008 fatcat:ro22whf7hfgqhdms5cn2mjw7n4