Four-Loop Perturbative Expansion for the Lattice N-Vector Model
classification
✦ hep-lat
keywords
computefour-loopmodelvectoranalyticanomalousbetacontributions
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We compute the four-loop contributions to the $\beta$-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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