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Dependence of calculated binding energies and widths of η-mesic nuclei on treatment of subthreshold η-nucleon interaction
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2002 |
| Abstract | Dependence of calculated binding energies and widths of η-mesic nuclei on treatment of subthreshold η-nucleon interaction Abstract We demonstrate that the binding energies ǫ η and widths Γ η of η-mesic nuclei depend strongly on subthreshold η-nucleon interaction. This strong dependence is made evident from comparing three different η-nucleus optical potentials: (1) a microscopic optical potential taking into account the full effects of off-shell ηN interaction; (2) a factorization approximation to the microscopic optical potential where a downward energy shift parameter is introduced to approximate the subthreshold ηN interaction; and (3) an optical potential using on-shell ηN scattering length as the interaction input. Our analysis indicates that the in-medium ηN interaction for bound-state formation is about 30 MeV below the free-space ηN threshold, which causes a substantial reduction of the attractive force between the η and nucleon with respect to that implied by the scattering length. Consequently, the scattering-length approach overpredicts the ǫ η and caution must be exercised when these latter predictions are used as guide in searching for η-nucleus bound states. We also show that final-state-interaction analysis cannot provide an unequivocal determination of the existence of η-nucleus bound state. More direct mea-1 surements are, therefore, necessary. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/nucl-th/0209082v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Active galactic nucleus Approximation algorithm Bound state Computer form factor Energy, Physics Interaction energy Mind Molecular orbital Multiple Endocrine Neoplasia Neuromuscular Electrical Stimulation Normal Statistical Distribution Nucleons Population Parameter Scattering length Solid-state drive Solutions Stanford University centers and institutes Supernumerary maxillary right third molar Time complexity Vii exponential |
| Content Type | Text |
| Resource Type | Article |
