Constraints on realistic Gauge-Higgs unified models

Details Constraints on realistic Gauge-Higgs unified models Constraints on realistic Gauge-Higgs unified models

2010-08-24

arxiv.org/abs/1008.3945v2

Phys.Rev.D82:096005,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 2 appendixes, 6 tables. Minor changes and references added. Version to appear in PRD

Scientific paper

10.1103/PhysRevD.82.096005

We investigate the general group structure of gauge-Higgs unified models. We find that a given embedding of the \sm\ gauge group will imply the presence of additional light vectors, except for a small set of special cases, which we determine; the arguments presented are independent of the compactification scheme. For this set of models we then find those that can both accommodate quarks and have a vanishing oblique T-parameter at tree-level. We show that none of the resulting models can have $|\sw| \sim1/2 $ (the sine of the weak-mixing angle) at tree-level and briefly discuss possible solutions to this problem.

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