dorsal/arxiv
View SchemaScalar-Meson - Baryon Coupling Constants in QCD Sum Rules
| Authors | G. Erkol, M. Oka, Th. A. Rijken, R. G. E. Timmermans |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0603058 |
| URL | https://arxiv.org/abs/nucl-th/0603058 |
| DOI | 10.1103/PhysRevC.73.044009 |
| Journal | Phys.Rev.C73:044009,2006 |
Abstract
The external-field QCD Sum Rules method is used to evaluate the coupling constants of the light-isoscalar scalar meson (``\sigma'' or \epsilon) to the \Lambda, \Sigma, and \Xi baryons. It is shown that these coupling constants as calculated from QCD Sum Rules are consistent with SU(3)-flavor relations, which leads to a determination of the F/(F+D) ratio of the scalar octet assuming ideal mixing: we find \alpha_s \equiv F/(F+D)=0.55. The coupling constants with SU(3) breaking effects are also discussed.
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"abstract": "The external-field QCD Sum Rules method is used to evaluate the coupling\nconstants of the light-isoscalar scalar meson (``\\sigma\u0027\u0027 or \\epsilon) to the\n\\Lambda, \\Sigma, and \\Xi baryons. It is shown that these coupling constants as\ncalculated from QCD Sum Rules are consistent with SU(3)-flavor relations, which\nleads to a determination of the F/(F+D) ratio of the scalar octet assuming\nideal mixing: we find \\alpha_s \\equiv F/(F+D)=0.55. The coupling constants with\nSU(3) breaking effects are also discussed.",
"arxiv_id": "nucl-th/0603058",
"authors": [
"G. Erkol",
"M. Oka",
"Th. A. Rijken",
"R. G. E. Timmermans"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.73.044009",
"journal_ref": "Phys.Rev.C73:044009,2006",
"title": "Scalar-Meson - Baryon Coupling Constants in QCD Sum Rules",
"url": "https://arxiv.org/abs/nucl-th/0603058"
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