dorsal/arxiv
View SchemaStrange chiral nucleon form factors
| Authors | Thomas R. Hemmert, Bastian Kubis, Ulf-G. Meißner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9904076 |
| URL | https://arxiv.org/abs/nucl-th/9904076 |
| DOI | 10.1103/PhysRevC.60.045501 |
| Journal | Phys.Rev. C60 (1999) 045501 |
Abstract
We investigate the strange electric and magnetic form factors of the nucleon in the framework of heavy baryon chiral perturbation theory to third order in the chiral expansion. All counterterms can be fixed from data. In particular, the two unknown singlet couplings can be deduced from the parity-violating electron scattering experiments performed by the SAMPLE and the HAPPEX collaborations. Within the given uncertainties, our analysis leads to a small and positive electric strangeness radius, $<r_{E,s}^2> = (0.05 \pm 0.09) fm^2$. We also deduce the consequences for the upcoming MAMI A4 experiment.
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"abstract": "We investigate the strange electric and magnetic form factors of the nucleon\nin the framework of heavy baryon chiral perturbation theory to third order in\nthe chiral expansion. All counterterms can be fixed from data. In particular,\nthe two unknown singlet couplings can be deduced from the parity-violating\nelectron scattering experiments performed by the SAMPLE and the HAPPEX\ncollaborations. Within the given uncertainties, our analysis leads to a small\nand positive electric strangeness radius, $\u003cr_{E,s}^2\u003e = (0.05 \\pm 0.09) fm^2$.\nWe also deduce the consequences for the upcoming MAMI A4 experiment.",
"arxiv_id": "nucl-th/9904076",
"authors": [
"Thomas R. Hemmert",
"Bastian Kubis",
"Ulf-G. Mei\u00dfner"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.60.045501",
"journal_ref": "Phys.Rev. C60 (1999) 045501",
"title": "Strange chiral nucleon form factors",
"url": "https://arxiv.org/abs/nucl-th/9904076"
},
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