  Scalar bosons composed of a pair of chiral fermions in a non-confining
potential have an effective Yukawa coupling, $g$, to free external chiral
fermions. At large distance a Feynman loop of external fermions generates a
scale invariant potential, $V_{loop}\propto -g^2/{r^{2}}$, which acts on
valence fermions for separation $\rho=2r$. This generally forces the $s$-wave
ground state to deform to a static, zero mass, configuration, and for slowly
running, perturbative $g$, a large external "shroud" wave-function forms. This
is related to old results of Landau and Lifshitz in quantum mechanics. The
massless composite scalar boson ground state is then an extended object.
Infra-red effects can generate a small mass for the system. This points to a
perturbative BEH-boson composed of top and anti-top quarks and a novel
dynamical mechanism for spontaneous electroweak symmetry breaking.
