Pseudo-axions in Little Higgs models

Details Pseudo-axions in Little Higgs models Pseudo-axions in Little Higgs models

2004-11-16

arxiv.org/abs/hep-ph/0411213v3

Phys.Rev.D71:015008,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 9 figs., accepted to PRD; footnote added, typos corrected

Scientific paper

10.1103/PhysRevD.71.015008

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 at the LHC and other future colliders in detail. In particular, their presence significantly affects the physics of the new heavy quark states predicted in Little Higgs models, and inclusive production at LHC may yield impressive diphoton resonances.

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