Global Analysis of General SU(2) x SU(2) x U(1) Models with Precision Data

Abstract

We present the results of a global analysis of a class of models with an extended electroweak gauge group of the form SU(2) x SU(2) x U(1), often denoted as G(221) models, which include as examples the left-right, the lepto-phobic, the hadro-phobic, the fermio-phobic, the un-unified, and the non-universal models. Using an effective Lagrangian approach, we compute the shifts to the coefficients in the electroweak Lagrangian due to the new heavy gauge bosons, and obtain the lower bounds on the masses of the Z' and W' bosons. The analysis of the electroweak parameter bounds reveals a consistent pattern of several key observables that are especially sensitive to the effects of new physics and thus dominate the overall shape of the respective parameter contours.

46 pages, 7 figures, and 11 tables

References in corpus (7)

• The Physics of Heavy Z' Gauge Bosons
• A Three Site Higgsless Model
• Testing the Standard Model by precision measurement of the weak charges of quarks
• Higgs Triplets and Limits from Precision Measurements
• Higgs Triplets, Decoupling, and Precision Measurements
• Low-Energy Effective Theory, Unitarity, and Non-Decoupling Behavior in a Model with Heavy Higgs-Triplet Fields
• Electroweak Chiral Lagrangian for $W^{\prime }$ Boson

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