Generating the electro-weak scale by vector-like quark condensation

The Weak Mixing Angle From TeV Scale Quark-Lepton Unification

Unified theories based on an extended left-right symmetric group, SU(4) × SU(2), are constructed in five dimensions. The compactification scale is assumed to be only a loop factor above the weak scale, so that the weak mixing angle is predicted to be close to its tree level value of 0.239. Boundary conditions in the 5th dimension break SU(4) → SU(3)×U(1)B−L , removing powerful constraints from ...

A vector-like heavy quark in the Littlest Higgs model

The Littlest Higgs model contains a new vector-like heavy quark in the up sector. There are two interesting features of its existence. One is that it extends the 3 × 3 CKM matrix in the Standard Model to a 4 × 3 matrix and the other is that it allows Z-mediated flavor changing neutral currents at tree level in the up sector but not in the down sector. We examine a few of possible windows in whi...

Top Quark Condensation 1.1 Preliminary

We review a class of dynamical models in which top condensation occurs at the weak scale, giving rise to the large top quark mass and other phenomena. This typically requires a color embedding, SU (3) c → SU (3) 1 × SU (3) 2 , ergo " Topcolor. " Topcolor suggests a novel route to technicolor models in which sequential quarks condense under the Topcolor interaction to break electroweak symmetrie...

Top quark condensation – a review

Vector condensation in QCD

The properties of the QCD vacuum at quark chemical potentials on the order of the pion mass and at zero temperature are by now quite well understood. The insight into this non-perturbative regime of QCD is obtained using chiral perturbation theory at nonzero quark chemical potentials [1–8]. The results apply not only to ordinary QCD but also to two color QCD and to QCD with quarks in the adjoin...