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