Little Higgs and Custodial SU(2)

Abstract

In this note we present a little Higgs model that has custodial SU(2) as an approximate symmetry. This theory is a simple modification of the ``Minimal Moose'' with SO(5) global symmetries protecting the Higgs mass. This allows for a simple limit where TeV physics makes small contributions to precision electroweak observables. The spectrum of particles and their couplings to Standard Model fields are studied in detail. At low energies this model has two Higgs doublets and it favours a light Higgs from precision electroweak bounds, though for different reasons than in the Standard Model. The limit on the breaking scale, f, is roughly 700 GeV, with a top partner of 2 TeV, W' and B' of 2.5 TeV, and heavy Higgs partners of 2 TeV. These particles are easily accessible at hadron colliders.

23 pages, some typos fixed, reference added, and some improved discussion. Version to appear in Phys Rev D

References in corpus (6)

• Phenomenology of the Little Higgs Model
• The Little Higgs from a Simple Group
• A "Littlest Higgs" Model with Custodial SU(2) Symmetry
• Loop induced decays of the Little Higgs: H --> gg, gamma gamma
• Collider Tests of the Little Higgs Model
• Higgs production and decay in the little Higgs model

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