The nucleon-sigma coupling constant in QCD Sum Rules
Nuclear Theory
2008-11-26 v1
Abstract
The external-field QCD Sum Rules method is used to evaluate the coupling constant of the light isoscalar-scalar meson (``'' or \epsilon) to the nucleon. The contributions that come from the excited nucleon states and the response of the continuum threshold to the external field are calculated. The obtained value of the coupling constant is compatible with the large value required in one-boson exchange potential models of the two-nucleon interaction.
Keywords
Cite
@article{arxiv.nucl-th/0603056,
title = {The nucleon-sigma coupling constant in QCD Sum Rules},
author = {G. Erkol and Th. A. Rijken and R. G. E. Timmermans},
journal= {arXiv preprint arXiv:nucl-th/0603056},
year = {2008}
}
Comments
11 pages, 4 figures