Phenomenology of the Top Mass in Realistic Extended Technicolor Models

Details Phenomenology of the Top Mass in Realistic Extended Technicolor Models Phenomenology of the Top Mass in Realistic Extended Technicolor Models

1996-01-22

arxiv.org/abs/hep-ph/9601305v1

Phys.Lett. B374 (1996) 145-151

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex, 12 pages, including 2 EPS figures in 5 files

Scientific paper

10.1016/0370-2693(96)00149-9

Extended technicolor (ETC) theories typically require ETC gauge bosons lighter than of order 1 TeV, to perturbatively generate the $t$ quark mass. We point out that explicit models of $t-b$ mass splitting also typically contain additional TeV scale ETC gauge bosons transforming in the {\it adjoint} of technicolor, leading to large weak-isospin-breaking effects observable in the $\rho$ parameter. Viable ETC models may thus require a lowest ETC scale of order 10 TeV, with relatively strong and finely tuned couplings to generate $m_t$. Such models do not generate observable corrections to the $Zb{\bar b}$ vertex.

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