Exact form factors of the O(N) $\sigma$-model
High Energy Physics - Theory
2016-03-02 v2
Abstract
A general form factor formula for the -model is constructed and applied to several operators. The large N limits of these form factors are computed and compared with the 1/N expansion of the -model in terms of Feynman graphs and full agreement is found. In particular, O(3) and O(4) form factors are discussed. For the -model several low particle form factors are calculated explicitly.
Cite
@article{arxiv.1308.1459,
title = {Exact form factors of the O(N) $\sigma$-model},
author = {Hrachya M. Babujian and Angela Foerster and Michael Karowski},
journal= {arXiv preprint arXiv:1308.1459},
year = {2016}
}
Comments
51 pages, additional text and references