Neutrino-nucleon scattering and the dimension of the symmetry-breaking Hamiltonian

Some implications of an analysis of neutrino-nucleon scattering using Wilson operator-product-expansions are presented: (A) If the divergence of the axial vector current behaves as a canonical pion field, then there exists an operator of dimension <= 0. (B) A ``maximal contribution assumption'' implies that ∆, the dimension of the SU(3) ⊗ SU(3) breaking Hamiltonian, is >= 2. We also discuss implications for internal symmetry of the vanishing of W_L.