The Intrinsic Coupling in Integrable Quantum Field Theories
High Energy Physics - Theory
2009-10-31 v1 High Energy Physics - Lattice
Abstract
The intrinsic 4-point coupling, defined in terms of a truncated 4-point function at zero momentum, provides a well-established measure for the interaction strength of a QFT. We show that this coupling can be computed non-perturbatively and to high accuracy from the form factors of an (integrable) QFT. The technique is illustrated and tested with the Ising model, the XY-model and the O(3) nonlinear sigma-model. The results are compared to those from high precision lattice simulations.
Cite
@article{arxiv.hep-th/0001097,
title = {The Intrinsic Coupling in Integrable Quantum Field Theories},
author = {J. Balog and M. Niedermaier and F. Niedermayer and A. Patrascioiu and E. Seiler and P. Weisz},
journal= {arXiv preprint arXiv:hep-th/0001097},
year = {2009}
}
Comments
69 pages, Latex