dorsal/arxiv
View SchemaThe piNN vertex function in a meson-theoretical model
| Authors | R. Boeckmann, C. Hanhart, O. Krehl, S. Krewald, J. Speth |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9905043 |
| URL | https://arxiv.org/abs/nucl-th/9905043 |
| DOI | 10.1103/PhysRevC.60.055212 |
| Journal | Phys.Rev. C60 (1999) 055212 |
Abstract
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.
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"abstract": "The piNN vertex function is calculated within a dispersion theoretical\napproach, including both pi-rho and pi-sigma intermediate states, where the\nsigma meson is an abbreviation for a correlated pion pair in a relative S-wave\nwith isospin I=0. A strong coupling between the pi-sigma and the pi-rho states\nis found. This leads to a softening of the piNN form factor. In a monopole\nparameterization, a cut-off Lambda=800 MeV is obtained as compared to\nLambda=1000 MeV using pi-rho intermediate states only.",
"arxiv_id": "nucl-th/9905043",
"authors": [
"R. Boeckmann",
"C. Hanhart",
"O. Krehl",
"S. Krewald",
"J. Speth"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.60.055212",
"journal_ref": "Phys.Rev. C60 (1999) 055212",
"title": "The piNN vertex function in a meson-theoretical model",
"url": "https://arxiv.org/abs/nucl-th/9905043"
},
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