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Four-Loop Perturbative Expansion for the Lattice N-Vector Model

Sergio Caracciolo, Andrea Pelissetto

hep-latarXiv:hep-lat/9510015

Abstract

We compute the four-loop contributions to the β-function and the anomalous dimension of the field for the O(N)-invariant N-vector model. These results are used to compute the second analytic corrections to the correlation length and the general spin-n susceptibility.

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