The effect of the in-medium Θ+ pentaquark on the kaon optical potential
- The kaon nuclear optical potential is studied including the effect of the Θ+ pentaquark. The one-nucleon contribution is obtained using an extension of the Jülich meson-exchange potential as bare kaon–nucleon interaction. Significant differences between a fully self-consistent calculation and the usually employed low-density Tρ approach are observed. The influence of the one-nucleon absorption process, KN→Θ+, on the kaon optical potential is negligible due to the small width of the pentaquark. In contrast, the two-nucleon mechanism, KNN→Θ+N, estimated from the coupling of the pentaquark to a two-meson cloud, provides the required amount of additional kaon absorption to reconcile with data the systematically low K+-nucleus reaction cross sections found by the theoretical models.
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| Author: | Laura TolósORCiD, Daniel Cabrera, Angels RamosORCiD, Artur PollsORCiD |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-762538 |
| DOI: | https://doi.org/10.1016/j.physletb.2005.10.061 |
| ISSN: | 0370-2693 |
| Parent Title (English): | Physics Letters B |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2005/11/15 |
| Date of first Publication: | 2005/11/15 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2023/10/06 |
| Tag: | Heavy-ion collisions; K+-nucleus interaction; KN interaction; Θ+ pentaquark |
| Volume: | 632.2006 |
| Issue: | 2 |
| Page Number: | 7 |
| First Page: | 219 |
| Last Page: | 225 |
| HeBIS-PPN: | 513363661 |
| Institutes: | Physik |
| Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS) | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - Namensnennung 3.0 |
