Four-loop free energy for the 2D O(n) nonlinear sigma-model with 0-loop and 1-loop Symanzik improved actions
High Energy Physics - Lattice
2009-10-31 v2 Condensed Matter
Abstract
We calculate up to four loops the free energy of the two-dimensional (2D) O(n) nonlinear sigma-model regularized on the lattice with the 0-loop and 1-loop Symanzik improved actions. An effective coupling constant based on this calculation is defined.
Keywords
Cite
@article{arxiv.hep-lat/9906012,
title = {Four-loop free energy for the 2D O(n) nonlinear sigma-model with 0-loop and 1-loop Symanzik improved actions},
author = {B. Alles and M. Pepe},
journal= {arXiv preprint arXiv:hep-lat/9906012},
year = {2009}
}
Comments
26 pages, Revtex. More details about the calculation procedure