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Electroweak precision observables and the unhiggs

Adam Falkowskia and Manuel Pérez-Victoriab

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We compute one-loop corrections to the S and T parameters in the Unhiggs scenario. In that scenario, the Standard Model Higgs is replaced by a non-local object, called the Unhiggs, whose spectral function displays a continuum above the mass gap. The Unhiggs propagator has effectively the same UV properties as the Standard Model Higgs propagator, which implies that loop corrections to the electroweak precision observables are finite and calculable. We show that the Unhiggs is consistent with electroweak precision tests when its mass gap is at the weak scale; in fact, it then mimics a light SM Higgs boson. We also argue that the Unhiggs, while being perfectly visible to electroweak precision observables, is invisible to detection at LEP.

Keywords

Beyond Standard Model

Higgs Physics

Field Theories in Higher Dimensions

 

E-print Number: 0901.3777

Cited: by |

Refers: to

PACS

12.15.Lk Electroweak radiative corrections

12.10.-g Unified field theories and models

14.80.Bn Standard-model Higgs bosons

13.66.-a Lepton-lepton interactions

Subjects

Particle physics and field theory

Dates

Issue 12 (December 2009)

Received 18 June 2009, accepted for publication 23 November 2009

Published 21 December 2009



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