Quark and Lepton Compositeness: A Renormalizable Model.

In the chiral SU(15) gauge theory presented here, the quarks and leptons are bound states ("prebaryons") of massless preons. The standard model charges of the preons imply three generations of quarks and leptons, plus some vectorlike fermions lighter than the confining scale Λ_{pre}. Under certain assumptions about the chiral dynamics, bound states of two prebaryons behave as Higgs fields. The QCD and electroweak groups may unify above Λ_{pre}, while SU(15) prevents rapid proton decay.