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|Title:||Delta(1232) isobar excitations and the ground state of nuclei|
Polls Martí, Artur
Entem, D. R.
|Publisher:||The American Physical Society|
|Abstract:||The influence of Delta isobar components on the ground-state properties of nuclear systems is investigated for nuclear matter as well as finite nuclei. Many-body wave functions, including isobar configurations and binding energies, are evaluated employing the framework of the coupled-cluster theory. It is demonstrated that the effect of isobar configurations depends in a rather sensitive way on the model used for the baryon-baryon interaction. As examples for realistic baryon-baryon interactions with explicit inclusion of isobar channels we use the local (V28) and nonlocal meson-exchange potentials (Bonn2000) but also a model recently developed by the Salamanca group, which is based on a quark picture. The differences obtained for the nuclear observables are related to the treatment of the interaction, the pi-exchange contributions in particular, at high momentum transfers.|
|Note:||Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.65.034316|
|It is part of:||Physical Review C, 2002, vol. 65, núm. 3, p. 034316-1-034316-7|
|Appears in Collections:||Articles publicats en revistes (Física Quàntica i Astrofísica)|
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