= Field scaling and anomalous dimension
{title2=$x_\phi=(D-2+\eta)/2$}
Under a length blocking factor $b$, a scalar scaling field transforms as $\phi'(x')=b^{x_\phi}\phi_<(bx')$. Its critical <connected correlation function> consequently decays as $r^{-2x_\phi}$. Comparing with $r^{-(D-2+\eta)}$ identifies the anomalous part of the field dimension. The uniform <conjugate field> has scaling exponent $y_h=D-x_\phi$. Wave-function factors must be defined explicitly before assigning a sign to their logarithmic derivatives.
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