Higgs doublet as a Goldstone boson in perturbative extensions of the Standard Model

Bellazzini, Brando; Pokorski, Stefan; Rychkov, Vyacheslav S.; Varagnolo, Alvise

Higgs doublet as a Goldstone boson in perturbative extensions of the Standard Model

Authors

Bellazzini, Brando

Pokorski, Stefan

Rychkov, Vyacheslav S.

Varagnolo, Alvise

Description

We investigate the idea of the Higgs doublet as a pseudo-Goldstone boson in perturbative extensions of the Standard Model, motivated by the desire to ameliorate its hierarchy problem without conflict with the electroweak precision data. Two realistic supersymmetric models with global SU(3) symmetry are proposed, one for large and another for small values of tanβ. The two models demonstrate two different mechanisms for EWSB and the Higgs mass generation. Their experimental signatures are quite different. Our constructions show that a pseudo-Goldstone Higgs doublet in perturbative extensions is just as plausible as in non-perturbative ones.
16pp, typos corrected, phenomenological discussion expanded