F. Bonetto, V. Mastropietro
Critical indices for the Yukawa2 quantum field theory
(200K, postscript)

ABSTRACT.  The understanding of the Yukawa2 quantum field theory is
still incomplete if the fermionic mass is much smaller than the
coupling. We analyze the Schwinger functions for small coupling
uniformly in the mass and we find that the asymptotic behavior of the
two-point Schwinger function is anomalous and described by two
critical indices, related to the renormalization of the mass and of
the wave function.  The indices are explicitly computed by convergent
series in the coupling.