Bounds on Flavor Gauge Bosons from Precision Electroweak Data

Details Bounds on Flavor Gauge Bosons from Precision Electroweak Data Bounds on Flavor Gauge Bosons from Precision Electroweak Data

1999-06-08

arxiv.org/abs/hep-ph/9906292v3

Phys.Rev. D61 (2000) 035009

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 15 eps figures. Minor changes for clarification. Version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.61.035009

Gauged flavor symmetries at low energies have been proposed in models of dynamical electroweak symmetry breaking and fermion mass generation. The massive flavor gauge bosons give rise to corrections to precisely measured electroweak quantities. We perform a fit to collider electroweak data and place indirect limits on such new physics. In particular we study several models from the literature: universal coloron; chiral top color; chiral, quark family symmetry; SU(9) and SU(12) chiral, flavor symmetry. The 95% exclusion limits on the mass of the heavy gauge bosons for these models, at their critical coupling for chiral symmetry breaking, typically lie between 1-3 TeV. We discuss the robustness of these bounds with respect to changes in higgs mass, b-quark asymmetry data, the SLD left right asymmetry data, or additional new physics.

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