dorsal/arxiv
View SchemaOn Nucleon Electromagnetic Form Factors: A Pre'cis
| Authors | A Hoell, R. Alkofer, M. Kloker, A. Krassnigg, C. D. Roberts, S. V. Wright |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0501033 |
| URL | https://arxiv.org/abs/nucl-th/0501033 |
| DOI | 10.1016/j.nuclphysa.2005.03.031 |
| Journal | Nucl.Phys.A755:298-302,2005 |
Abstract
Electron scattering at large Q^2 probes a nucleon's quark core. This core's contribution to electromagnetic form factors may be calculated using Poincare' covariant Faddeev amplitudes combined with a nucleon-photon vertex that automatically fulfills a Ward-Takahashi identity for on-shell nucleons. The calculated behaviour of G_E^p(Q^2)/G_M^p(Q^2) on 2<Q^2(GeV^2)<6 agrees with that inferred from polarisation transfer data, and exhibits a zero at Q^2\approx 6.5 GeV^2. There is some evidence that F_2(Q^2)/F_1(Q^2) \propto [\ln(Q^2/\Lambda^2)]^2/Q^2 for Q^2>6 GeV^2.
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"abstract": "Electron scattering at large Q^2 probes a nucleon\u0027s quark core. This core\u0027s\ncontribution to electromagnetic form factors may be calculated using Poincare\u0027\ncovariant Faddeev amplitudes combined with a nucleon-photon vertex that\nautomatically fulfills a Ward-Takahashi identity for on-shell nucleons. The\ncalculated behaviour of G_E^p(Q^2)/G_M^p(Q^2) on 2\u003cQ^2(GeV^2)\u003c6 agrees with\nthat inferred from polarisation transfer data, and exhibits a zero at\nQ^2\\approx 6.5 GeV^2. There is some evidence that F_2(Q^2)/F_1(Q^2) \\propto\n[\\ln(Q^2/\\Lambda^2)]^2/Q^2 for Q^2\u003e6 GeV^2.",
"arxiv_id": "nucl-th/0501033",
"authors": [
"A Hoell",
"R. Alkofer",
"M. Kloker",
"A. Krassnigg",
"C. D. Roberts",
"S. V. Wright"
],
"categories": [
"nucl-th",
"hep-lat",
"hep-ph",
"nucl-ex"
],
"doi": "10.1016/j.nuclphysa.2005.03.031",
"journal_ref": "Nucl.Phys.A755:298-302,2005",
"title": "On Nucleon Electromagnetic Form Factors: A Pre\u0027cis",
"url": "https://arxiv.org/abs/nucl-th/0501033"
},
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