Polchinski equation, reparameterization invariance and the derivative expansion
arXiv:hep-th/9705129 · doi:10.1016/S0550-3213(97)00692-5
Abstract
The connection between the anomalous dimension and some invariance properties of the fixed point actions within exact RG is explored. As an application, Polchinski equation at next-to-leading order in the derivative expansion is studied. For the Wilson fixed point of the one-component scalar theory in three dimensions we obtain the critical exponents η=0.042, ν=0.622 and ω=0.754.
28 pages, LaTeX with psfig, 12 encapsulated PostScript figures. A number wrongly quoted in the abstract corrected