Effects of technicolor on standard model running couplings

Details Effects of technicolor on standard model running couplings Effects of technicolor on standard model running couplings

1994-02-18

arxiv.org/abs/hep-ph/9402319v1

Phys.Rev. D50 (1994) 3491-3497

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages of LaTeX, UTPT-94-3

Scientific paper

10.1103/PhysRevD.50.3491

We discuss the running couplings in the standard model, SU(3$)_C \times $SU(2$)_L \times $U(1$)_Y$, when the Higgs sector is replaced by SU($N_{TC})$ technicolor. Particular attention is given to the running of the couplings at momentum scales where technicolor is nonperturbative, and in this region we apply a relativistic constituent technifermion model. This model has been tested against the known running of the QED coupling due to nonperturbative QCD. An understanding of this low momentum running allows the calculation of the couplings at a higher scale, $\Lambda_{pert}$, where technicolor becomes perturbative. We provide numerical values for the changes in the three standard model couplings between $m_Z$ and $\Lambda_{pert}$ due to technicolor, assuming separately ``one doublet'' and ``one family'' technicolor models. The distinction between a running and walking technicolor coupling is also considered.

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