Bilepton and exotic quark mass limits in 331 models from Z -> b anti-b decay

Abstract

We study the effect of new physics on the Z-decay into b anti-b pairs in the framework of 331 models. The decay Z -> b anti-b is computed at one loop level and, using previous results, we evaluate this branching fraction in the framework of 331 models. A wide range of the space parameter of the model is considered and possible deviations from the standard model predictions are explored. From precision measurements at the Z-pole we find the allowed region for MJ3, MX at 95 % CL.

arXiv comment15 pages, 4 figures

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• SU(3)_{c} X SU(3)_{L} X U(1)_{X} models for βarbitrary and families with mirror fermions
• Interesting radiative patterns of neutrino mass in an SU(3)_C X SU(3)_L X U(1)_X model with right-handed neutrinos
• Z and Z' decays with and without FCNC in 331 models
• Flavor Changing Neutral Current Effects and CP Violation in the Minimal 3-3-1 Model
• Lepton number violation in 331 models
• Standard-model-like Higgs boson production at the CERN LHC in 3-3-1 model with right-handed neutrinos
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• Charged Bilepton Pair Production at LHC Including Exotic Quark Contribution
• Heavy quark signals from radiative corrections to the $Z^{\prime }$ boson decay in 3-3-1 models
• Decay $t->c\gamma$ in models with SU_L(3)XU_X(1) gauge symmetry