Analytical results for the four-loop RG functions in the 2D non-linear
O(n) σ-model on the lattice [PDF]
O. VeretinWe recalculate four-loop renormalization group functions in 2-dimensional nonlinear O(n) {\sigma}-model using coordinate-space method. The high accuracy of calculation allow us to find the analytical form of {\beta}- and {\gamma}-function (anomaluos dimension).View original: http://arxiv.org/abs/1306.2771
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