dorsal/arxiv
View SchemaBaryon-Baryon Interactions
| Authors | Th. A. Rijken |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9401004 |
| URL | https://arxiv.org/abs/nucl-th/9401004 |
| Journal | Few Body Syst.Suppl. 7 (1994) 1-12 |
Abstract
After a short survey of some topics of interest in the study of baryon-baryon scattering, the recent Nijmegen energy dependent partial wave analysis (PWA) of the nucleon-nucleon data is reviewed. In this PWA the energy range for both pp and np is now 0 < Tlab < 350 MeV and a chi^2_{d.o.f.}=1.08 was reached. The implications for the pion-nucleon coupling constants are discussed. Comments are made with respect to recent discussions around this coupling constant in the literature. In the second part, we briefly sketch the picture of the baryon in several, more or less QCD-based, quark-models that have been rather prominent in the literature. Inspired by these pictures we constructed a new soft-core model for the nucleon-nucleon interaction and present the first results of this model in a chi^2 -fit to the new multi-energy Nijmegen PWA. With this new model we succeeded in narrowing the gap between theory and experiment at low energies. For the energies Tlab = 25-320 MeV we reached a record low chi^2_{p.d.p.} = 1.16. We finish the paper with some conclusions and an outlook describing the extension of the new model to baryon-baryon scattering.
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"abstract": "After a short survey of some topics of interest in the study of baryon-baryon\nscattering, the recent Nijmegen energy dependent partial wave analysis (PWA) of\nthe nucleon-nucleon data is reviewed. In this PWA the energy range for both pp\nand np is now 0 \u003c Tlab \u003c 350 MeV and a chi^2_{d.o.f.}=1.08 was reached. The\nimplications for the pion-nucleon coupling constants are discussed. Comments\nare made with respect to recent discussions around this coupling constant in\nthe literature. In the second part, we briefly sketch the picture of the baryon\nin several, more or less QCD-based, quark-models that have been rather\nprominent in the literature. Inspired by these pictures we constructed a new\nsoft-core model for the nucleon-nucleon interaction and present the first\nresults of this model in a chi^2 -fit to the new multi-energy Nijmegen PWA.\nWith this new model we succeeded in narrowing the gap between theory and\nexperiment at low energies. For the energies Tlab = 25-320 MeV we reached a\nrecord low chi^2_{p.d.p.} = 1.16. We finish the paper with some conclusions and\nan outlook describing the extension of the new model to baryon-baryon\nscattering.",
"arxiv_id": "nucl-th/9401004",
"authors": [
"Th. A. Rijken"
],
"categories": [
"nucl-th"
],
"journal_ref": "Few Body Syst.Suppl. 7 (1994) 1-12",
"title": "Baryon-Baryon Interactions",
"url": "https://arxiv.org/abs/nucl-th/9401004"
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