dorsal/arxiv
View SchemaChiral Symmetry and the Nucleon's Vector Strangeness Form Factors
| Authors | M. J. Musolf, Hiroshi Ito |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9607021 |
| URL | https://arxiv.org/abs/nucl-th/9607021 |
| DOI | 10.1103/PhysRevC.55.3066 |
| Journal | Phys.Rev.C55:3066-3082,1997 |
Abstract
The nucleon's strange-quark vector current form factors are studied from the perspective of chiral symmetry. It is argued that chiral perturbation theory cannot yield a prediction for the strangeness radius and magnetic moment. Arrival at definite predictions requires the introduction of additional, model-dependent assumptions which go beyond the framework of chiral perturbation theory. A variety of such model predictions is surveyed, and the credibility of each is evaluated. The most plausible prediction appears in a model where the unknown chiral counterterms are identified with $t$-channel vector meson exchange amplitudes. The corresponding prediction for the mean square Dirac strangeness radius is $\langle r_s^2\rangle = 0.24$ fm$^2$, which would be observable in up-coming semileptonic determinations of the nucleon's strangeness form factors.
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"abstract": "The nucleon\u0027s strange-quark vector current form factors are studied from the\nperspective of chiral symmetry. It is argued that chiral perturbation theory\ncannot yield a prediction for the strangeness radius and magnetic moment.\nArrival at definite predictions requires the introduction of additional,\nmodel-dependent assumptions which go beyond the framework of chiral\nperturbation theory. A variety of such model predictions is surveyed, and the\ncredibility of each is evaluated. The most plausible prediction appears in a\nmodel where the unknown chiral counterterms are identified with $t$-channel\nvector meson exchange amplitudes. The corresponding prediction for the mean\nsquare Dirac strangeness radius is $\\langle r_s^2\\rangle = 0.24$ fm$^2$, which\nwould be observable in up-coming semileptonic determinations of the nucleon\u0027s\nstrangeness form factors.",
"arxiv_id": "nucl-th/9607021",
"authors": [
"M. J. Musolf",
"Hiroshi Ito"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.55.3066",
"journal_ref": "Phys.Rev.C55:3066-3082,1997",
"title": "Chiral Symmetry and the Nucleon\u0027s Vector Strangeness Form Factors",
"url": "https://arxiv.org/abs/nucl-th/9607021"
},
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