Renormalization Group Flow Equations For The Scalar O(N) Theory
  Self-consistent new renormalization group flow equations for an O(N)-symmetric scalar theory are approximated in next-to-leading order of the derivative expansion. The Wilson-Fisher fixed point in three dimensions is analyzed in detail and various critical exponents are calculated. 
B.-J. Schaefer, O. Bohr, J. Wambach (TU Darmstadt)