Topcolor-like dynamics and new matter generations

Abstract

We explore a scenarios where topcolor-like dynamics operates in the presence of fourth generation matter fields. Using the Minimal Walking Technicolor as a concrete basis for model building, we construct explicit models and confront them with phenomenology. We show that if a new QCD generations exist, both the top-bottom mass splitting as well as the splitting between bottom quark mass and the masses of the fourth generation quarks can be naturally explained within topcolor-like dynamics. On the other hand, the much studied Minimal Walking Technicolor model where only a fourth generation of leptons arise, also leads to a viable model.

11pages, 1figure

References in corpus (2)

• Zero of the discrete beta function in SU(3) lattice gauge theory with color sextet fermions
• Phase structure of SU(3) gauge theory with two flavors of symmetric-representation fermions