|
Title:
|
Delta(1232) isobar excitations and the ground state of nuclei
|
|
Author:
|
Frick, T.; Kaiser, S.; Müther, Herbert; Polls Martí, Artur; Entem, D. R.; Machleidt, R.
|
|
Other authors:
|
Universitat de Barcelona |
|
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. |
|
Subject(s):
|
-Estructura nuclear
-Excitació nuclear
-Nuclear structure
-Nuclear excitation |
|
Rights:
|
(c) The American Physical Society, 2002
|
|
Document type:
|
Article
Article - Published version |
|
Published by:
|
The American Physical Society
|
|
Share:
|
|
