Fermion Condensate as Higgs substitute

TL;DR

This paper proposes a dynamical symmetry breaking model using strongly interacting fermions as a Higgs substitute, generating fermion and gauge boson masses without a fundamental scalar.

Contribution

It introduces a novel fermion condensate mechanism for electroweak symmetry breaking, replacing the standard Higgs field with composite fermion states.

Findings

Fermion condensate can effectively break electroweak symmetry.

Model predicts new charged fermions detectable at colliders.

Constraints from unitarity and electroweak precision tests are satisfied.

Abstract

A dynamical symmetry breaking model of electroweak interactions is investigated based on strongly interacting fermions. Vector-like fermions of different representations of the weak SU(2) form a symmetry breaking condensate and generate the lepton and quark masses. The weak gauge bosons get their usual standard model masses from a gauge invariant effective Lagrangian of a doublet scalar field composed of the new fermion fields. Gap equations are derived and the conditions for finding a symmetry breaking solution are presented. The parameters of the model are constrained further by perturbative unitarity. The oblique electroweak corrections only slightly constrain the model. It is shown that the new charged fermions are produced at the next linear colliders in large number and the cross section for the LHC is presented.