Extreme technicolor & the walking critical temperature

MCRG Minimal Walking Technicolor

Walking Technicolor and the Zbb̄ Vertex

A slowly-running technicolor coupling will affect the size of nonoblique corrections to the Zbb̄ vertex from extended technicolor dynamics. We show that while “walking technicolor” reduces the magnitude of the corrections, they generally remain large enough to be seen at LEP. BUHEP-93-11 EFI-93-27 HUTP-93/A012 YCTP-P10-93 hep-ph/9305232 Electronic mail addresses: [email protected], gates@tyrone...

Walking Technicolor and Electroweak Radiative Corrections

We examine the effect of walking technicolor dynamics on the electroweak S parameter and contrast it with the effect of QCD-like technicolor dynamics. Our main tools are the operator product expansion for the high-momentum behavior of the electroweak gauge boson vacuum polarizations and the analyticity of these polarizations which relate their low and high momentum behaviors. We show that where...

Technicolor 2000 1. the Motivation for Technicolor and Extended Technicolor

This review is based on lectures on technicolor and extended technicolor presented at the Frascati Spring School in May 2000. I summarize the motivation and structure of this theory of dynamical breaking of electroweak and flavor symmetries. Particular attention is paid to the main phenomenological obstacles to this picture— flavor–changing neutral currents, precision electroweak measurements, ...

Mass enhancement and critical behavior in technicolor theories.

Quark and lepton masses in technicolor theories can be enhanced if the high energy, extended technicolor (ETC) interactions play an important role in electroweak symmetry breaking. This happens when the ETC coupling and the technicolor gauge coupling at high energies lie close to a certain critical line. The enhancement has been associated with the existence of composite scalars made mainly of ...