Strong extended technicolour interactions and the Zbb̄ vertex

  title={Strong extended technicolour interactions and the Zbb̄ vertex},
  author={Nick Evans},
  journal={Physics Letters B},
  • N. Evans
  • Published 21 March 1994
  • Physics
  • Physics Letters B
13 Citations

Extended technicolor contribution to the Zbb vertex.

The diagonal contribution can naturally explain the LEP result of Rb in some models of the ETC theory and some mechanisms which genera~e negative contribution to the T parameter are needed to explain the the experimental value of R b by the diagonal ETC boson.

Dynamical Stabilization of the Fermi Scale: Phase Diagram of Strongly Coupled Theories for (Minimal) Walking Technicolor and Unparticles

We summarize basic features associated to dynamical breaking of the electroweak symmetry. The knowledge of the phase diagram of strongly coupled theories as function of the number of colors, flavors

Conformal Dynamics for TeV Physics and Cosmology

We introduce the topic of dynamical breaking of the electroweak symmetry and its link to unparticle physics and cosmology. The knowledge of the phase diagram of strongly coupled theories plays a



The width of theZ boson

We present a detailed discussion of the electroweak radiative corrections to the partial decay widths of theZ boson into lepton and quark pairs (q≠t) and to the total width for 5 flavors. The results

Chiral hierarchies from slowly running couplings in technicolor theories.

Chiral-symmetry breaking in asymptotically free theories with slowly running couplings is analyzed and an enhancement of the fermion condensate defined with the ultraviolet cutoff M, while the Goldstone-boson decay constant F remains essentially unaltered.

Nonoblique effects in the Zbb-bar vertex from extended technicolor dynamics.

Extended technicolor theories generate potentially large corrections to the {ital Zb{bar b}} vertex which can be observed in current experiments at the CERN {ital e}{sup +}{ital e{minus}} collider