Impact of extra particles on indirect Z' limits

Abstract

We study the possibility of relaxing the indirect limits on extra neutral vector bosons by their interplay with additional new particles. They can be systematically weakened, even below present direct bounds at colliders, by the addition of more vector bosons and/or scalars designed for this purpose. Otherwise, they appear to be robust.

Latex 23 pages, 8 eps figures. Minor changes, version published in Phys. Rev. D

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• Electroweak limits on physics beyond the Standard Model
• Kinetic and mass mixing with three abelian groups
• Lepton Number Violation: Seesaw Models and Their Collider Tests
• Effects of Family Nonuniversal Z' Boson on Leptonic Decays of Higgs and Weak Bosons
• Tree-level Unitarity in SU(2)${}_L\times$U(1)${}_Y\times$U(1)${}_{Y^{\prime }}$ Models