Gasser, Jürg ; Hoferichter, Martin ; Leutwyler, Heinrich ; Rusetsky, Akaki (2015)
Cottingham formula and nucleon polarisabilities.
In: The European Physical Journal C, 75 (8)
doi: 10.1140/epjc/s10052-015-3580-9
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The difference between the electromagnetic selfenergies of proton and neutron can be calculated with the Cottingham formula, which expresses the self-energies as an integral over the electroproduction cross sections – provided the nucleon matrix elements of the current commutator do not contain a fixed pole. We show that, under the same proviso, the subtraction function occurring in the dispersive representation of the virtual Compton forward scattering amplitude is determined by the cross sections. The representation in particular leads to a parameter-free sum rule for the nucleon polarisabilities. We evaluate the sum rule for the difference between the electric polarisabilities of proton and neutron by means of the available parameterisations of the data and compare the result with experiment.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Gasser, Jürg ; Hoferichter, Martin ; Leutwyler, Heinrich ; Rusetsky, Akaki |
| Art des Eintrags: | Bibliographie |
| Titel: | Cottingham formula and nucleon polarisabilities |
| Sprache: | Englisch |
| Publikationsjahr: | 2015 |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | The European Physical Journal C |
| Jahrgang/Volume einer Zeitschrift: | 75 |
| (Heft-)Nummer: | 8 |
| Kollation: | 28 Seiten |
| DOI: | 10.1140/epjc/s10052-015-3580-9 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | The difference between the electromagnetic selfenergies of proton and neutron can be calculated with the Cottingham formula, which expresses the self-energies as an integral over the electroproduction cross sections – provided the nucleon matrix elements of the current commutator do not contain a fixed pole. We show that, under the same proviso, the subtraction function occurring in the dispersive representation of the virtual Compton forward scattering amplitude is determined by the cross sections. The representation in particular leads to a parameter-free sum rule for the nucleon polarisabilities. We evaluate the sum rule for the difference between the electric polarisabilities of proton and neutron by means of the available parameterisations of the data and compare the result with experiment. |
| Zusätzliche Informationen: | Link zum Erratum: urn:nbn:de:tuda-tuprints-208000 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik |
| Hinterlegungsdatum: | 02 Aug 2024 12:38 |
| Letzte Änderung: | 02 Aug 2024 12:38 |
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| Suche nach Titel in: | TUfind oder in Google |
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Cottingham formula and nucleon polarisabilities. (deposited 02 Mär 2022 09:41)
- Cottingham formula and nucleon polarisabilities. (deposited 02 Aug 2024 12:38) [Gegenwärtig angezeigt]
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