MODELS AND PHENOMENOLOGY

Little Higgs Models and Their Phenomenology

This article reviews the Little Higgs models of electroweak symmetry breaking and their phenomenology. Little Higgs models incorporate a light composite Higgs boson and remain perturbative until a scale of order 10 TeV, as required by precision electroweak data. The collective symmetry breaking mechanism, which forms the basis of Little Higgs models, is introduced. An explicit, fully realistic ...

Models of Traps and Glass Phenomenology

We study various models of independent particles hopping between energy ‘traps’ with a density of energy barriers ρ(E), on a d dimensional lattice or on a fully connected lattice. If ρ(E) decays exponentially, a true dynamical phase transition between a high temperature ‘liquid’ phase and a low temperature ‘aging’ phase occurs. More generally, however, one expects that for a large class of ρ(E)...

Phenomenology and Post-Modernity

CP Phenomenology in Heterotic String Models

I discuss aspects of the CP problem in heterotic orbifolds which arises in models with low energy supersymmetry. Recent measurements of the CP asymmetry in the B → ΨKs decay [1] imply that CP is significantly violated in nature and is not an approximate symmetry. Supersymmetric models with large CP phases generally predict fermion electric dipole moments (EDMs) that far exceed the experimental ...

Radion Phenomenology in Realistic Warped Space Models

We investigate the phenomenology of the Randall-Sundrum radion in realistic models of electroweak symmetry breaking with bulk gauge and fermion fields, since the radion may turn out to be the lightest particle in such models. We calculate the coupling of the radion in such scenarios to bulk fermion and gauge modes. Special attention needs to be devoted to the coupling to massless gauge fields (...