Chirally motivated K^- nuclear potentials
| Autor: | Cieplý, A., Friedman, E., Gal, A., Gazda, D., Mareš, J. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Phys. Lett. B 702 (2011) 402-407 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.physletb.2011.07.040 |
| Popis: | In-medium subthreshold KbarN scattering amplitudes calculated within a chirally motivated meson-baryon coupled-channel model are used self consistently to confront K^- atom data across the periodic table. Substantially deeper K^- nuclear potentials are obtained compared to the shallow potentials derived in some approaches from threshold amplitudes, with Re V_{chiral} = -(85+/-5) MeV at nuclear matter density. When KbarNN contributions are incorporated phenomenologically, a very deep K^- nuclear potential results, Re V_{chiral+phen.} = -(180+/-5) MeV, in agreement with density dependent potentials obtained in purely phenomenological fits to the data. Self consistent dynamical calculations of K^- nuclear quasibound states are reported and discussed. Comment: extended discussion, unchanged results and conclusions, accepted by PLB |
| Databáze: | arXiv |
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