Light custodians in natural composite Higgs models

Roberto Contino, Leandro Da Rold, Alex Pomarol

Research output: Contribution to journalArticleResearchpeer-review

473 Citations (Scopus)


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 CERN LHC. © 2007 The American Physical Society.
Original languageEnglish
Article number055014
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
Publication statusPublished - 23 Mar 2007


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