Light custodians in natural composite Higgs models

Details Light custodians in natural composite Higgs models Light custodians in natural composite Higgs models

2006-12-05

arxiv.org/abs/hep-ph/0612048v1

Phys.Rev.D75:055014,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 2 figures

Scientific paper

10.1103/PhysRevD.75.055014

We present a class of composite Higgs models arising from a warped extra dimension that can satisfy all the electroweak precision tests in a significant portion of their parameter space. A custodial symmetry plays a crucial role in keeping the largest corrections to the electroweak observables below their experimental limits. In these models the heaviness of the top quark is not only essential to trigger the electroweak symmetry breaking, but it also implies that the lowest top resonance and its custodial partners, the custodians, are significantly lighter than the other resonances. These custodians are the trademark of these scenarios. They are exotic colored fermions of electromagnetic charges 5/3, 2/3 and -1/3, with masses predicted roughly in the range 500-1500 GeV. We discuss their production and detection at the LHC.

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