Isospin breaking and fine-tuning in top-color assisted technicolor

  title={Isospin breaking and fine-tuning in top-color assisted technicolor},
  author={R Sekhar Chivukula and Bogdan A. Dobrescu and John Terning},
  journal={Physics Letters B},

Electroweak chiral Lagrangian from a natural topcolor-assisted technicolor model

Based on previous studies on computing coefficients of the electroweak chiral Lagrangian from C. T. Hill's schematic topcolor-assisted technicolor model, we generalize the calculation to K. Lane's

Generational Structure of Models with Dynamical Symmetry Breaking

In models with dynamical electroweak symmetry breaking, this breaking is normally communicated to quarks and leptons by a set of vector bosons with masses generated via sequential breaking of a



Mass enhancement and critical behavior in technicolor theories.

This paper investigates the properties of composite scalars made mainly of technifermions and finds that for realistic values of the gauge coupling, the scalars will not be narrow resonances, and concludes that unless the technicolor coupling at the E TC scale is unrealistically weak and the ETC coupling is very close to the critical curve, these light states will have large widths.

Breaking of isospin symmetry in theories with a dynamical Higgs mechanism.

A strongly interacting Higgs theory is considered and new sources of isospin-symmetry breaking are found; in particular there is one which contributes directly to the \ensuremath{\rho} parameter with strength that is linear in the effective Yukawa coupling of the heaviest ordinary fermion.

Top quark production: Sensitivity to new physics.

  • HillParke
  • Physics
    Physical review. D, Particles and fields
  • 1994
New resonance physics is most readily discernible in the high–pT distributions of the single top quark and of the W boson.

Model-independent global constraints on new physics.

Using effective-Lagrangian techniques, a systematic survey of the lowest-dimension effective interactions through which heavy physics might manifest itself in present experiments finds that most are quite strongly bounded by the current data.

Weak-isospin violation in "walking" technicolor.

We show that the mechanism which enhances ordinary fermion masses and raises the masses of pseudo Goldstone bosons in walking-technicolor models may also lead to an enhancement of