Scale invariance and chiral noninvariance in a form-diemsional interacting theory

A variant of the ''finite'' field theory approach of Gell-Mann and Low is presented in a massless quark model with singlet gluons. A solution is exhibited for which the gluon wave function renormalization constant is finite but with the quark bare mass infinite. Its spacetime structure is very different from the zero-physical-mass limit of the Adler-Baker-Johnson-Willey electrodynamics. The quark propagator exhibits a square-root cut running from p2 = 0 to infinity and it breaks γ5-invariance but yet preserves scale invariance. The quark-gluon substructure remains unobservable. An interesting consequence of the model is the departure of the e+e- annihilation cross-section into hadrons from the free-quark model result. The other features are: a) the existence of Goldstone bosons, b) an explicit realization of Kallen's conjecture in quantum electrodynamics and c) a counter-example to the extension of the Federbush-Johnson-Jost-Schroer outside the charge-zero sector of the present model