The piNN vertex function in a meson-theoretical model
核理论
2009-10-31 v2
摘要
The piNN vertex function is calculated within a dispersion theoretical approach, including both pi-rho and pi-sigma intermediate states, where the sigma meson is an abbreviation for a correlated pion pair in a relative S-wave with isospin I=0. A strong coupling between the pi-sigma and the pi-rho states is found. This leads to a softening of the piNN form factor. In a monopole parameterization, a cut-off Lambda=800 MeV is obtained as compared to Lambda=1000 MeV using pi-rho intermediate states only.
引用
@article{arxiv.nucl-th/9905043,
title = {The piNN vertex function in a meson-theoretical model},
author = {R. Boeckmann and C. Hanhart and O. Krehl and S. Krewald and J. Speth},
journal= {arXiv preprint arXiv:nucl-th/9905043},
year = {2009}
}
备注
6 pages, 8 figures