Gast ::
| Hauptseite > Publikationsdatenbank > Pion- und Photoabsorption an Kernen im Delta-Resonanzbereich > print |
| Hauptseite > Publikationsdatenbank > Pion- und Photoabsorption an Kernen im Delta-Resonanzbereich > print |
| 001 | 848413 | ||
| 005 | 20210129234124.0 | ||
| 024 | 7 | _ | |a 2128/19057 |2 Handle |
| 037 | _ | _ | |a FZJ-2018-03649 |
| 041 | _ | _ | |a German |
| 088 | 1 | _ | |a Juel-2540 |
| 088 | _ | _ | |a Juel-2540 |2 JUEL |
| 100 | 1 | _ | |a Körfgen, Bernd |0 P:(DE-Juel1)132176 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a Pion- und Photoabsorption an Kernen im Delta-Resonanzbereich |
| 260 | _ | _ | |a Jülich |c 1991 |b Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag |
| 300 | _ | _ | |a 91 p. |
| 336 | 7 | _ | |a report |2 DRIVER |
| 336 | 7 | _ | |a REPORT |2 ORCID |
| 336 | 7 | _ | |a Report |0 10 |2 EndNote |
| 336 | 7 | _ | |a Book |0 PUB:(DE-HGF)3 |2 PUB:(DE-HGF) |m book |
| 336 | 7 | _ | |a Output Types/Report |2 DataCite |
| 336 | 7 | _ | |a Report |b report |m report |0 PUB:(DE-HGF)29 |s 1529580456_9484 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a TECHREPORT |2 BibTeX |
| 490 | 0 | _ | |a Berichte des Forschungszentrums Jülich |v 2540 |
| 520 | _ | _ | |a In charge-exchange reactions and in $\pi$-absorption at intermediate energies the $\Delta$ peak position in nuclei is shifted downwards in energy compared to the $\Delta$-excitation of the nucleon. For electromagnetic probes the experimental data do not show such a shift. We describe the excitation of the $\Delta$ in nuclei consistently for all these different probes using the isobar-hole-model ($\Delta$N$^{-1}$-model). The shift of the $\Delta$ peak position in chargeexchange reactions and in $\pi$-absorption is due to an attractive $\Delta$N$^{-1}$-residual interaction in the spin-longitudinal ($\overrightarrow{\sigma} \cdot \overrightarrow{q}$) channel. A $\Delta$N$^{-1}$-residual interaction consisting of the $\pi$-exchange potential alone is too attractive in the spin-longitudinal channel and shifts the $\Delta$ peak position for $\pi$-absorption to too low energies. In order to reproduce the $\Delta$ peak position we have to include short range correlations in the $\Delta$N$^{-1}$-residual interaction. This is done either by adding a $\delta$-force, parametrized through the Landau-Migdal-parameter g$^{'}_{\Delta \Delta}$, to the $\pi$-exchange potential, or by multiplying the $\pi$-exchange potential with a correlation-function. This leads to a repulsive $\Delta$N$^{-1}$-residual interaction in the spin-transverse ($\overrightarrow{\sigma}$ x $\overrightarrow{q}$) channel, which shifts the $\Delta$ peak position in the calculations for photo-absorption to higher energies compared to the photo-absorption on the nucleon. |
| 536 | _ | _ | |a 899 - ohne Topic (POF3-899) |0 G:(DE-HGF)POF3-899 |c POF3-899 |f POF III |x 0 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/848413/files/J%C3%BCl_2540_K%C3%B6rfgen.pdf |y OpenAccess |
| 909 | C | O | |o oai:juser.fz-juelich.de:848413 |p openaire |p open_access |p VDB |p driver |p dnbdelivery |
| 910 | 1 | _ | |a Forschungszentrum Jülich |0 I:(DE-588b)5008462-8 |k FZJ |b 0 |6 P:(DE-Juel1)132176 |
| 913 | 1 | _ | |a DE-HGF |b Programmungebundene Forschung |l ohne Programm |1 G:(DE-HGF)POF3-890 |0 G:(DE-HGF)POF3-899 |2 G:(DE-HGF)POF3-800 |v ohne Topic |x 0 |4 G:(DE-HGF)POF |3 G:(DE-HGF)POF3 |
| 915 | _ | _ | |a OpenAccess |0 StatID:(DE-HGF)0510 |2 StatID |
| 920 | _ | _ | |l yes |
| 920 | 1 | _ | |0 I:(DE-Juel1)PRE2000-20140101 |k PRE-2000 |l Publikationen vor 2000 |x 0 |
| 980 | _ | _ | |a report |
| 980 | _ | _ | |a VDB |
| 980 | _ | _ | |a UNRESTRICTED |
| 980 | _ | _ | |a book |
| 980 | _ | _ | |a I:(DE-Juel1)PRE2000-20140101 |
| 980 | 1 | _ | |a FullTexts |
| Library | Collection | CLSMajor | CLSMinor | Language | Author |
|---|