arXiv:hep-lat/9909019·v1·High Energy Physics — Lattice
Four loop results for the 2D O(n) nonlinear sigma model with 0-loop and 1-loop Symanzik actions
B. Alles (Milano-Bicocca)🇮🇹 · M. Pepe (Milano-Bicocca)🇮🇹
Abstract
We present complete three loop results and preliminary four loop results for the 2D O(n) nonlinear sigma model with 0-loop and 1-loop Symanzik improved actions. This calculation aims to test the improvement in the numerical precision that the combination of Symanzik actions and effective couplings can give in Monte Carlo simulations.
Comments: LATTICE99(spin models). 3 pages, contains espcrc2.sty file