0384764 - ÚJF 2013 RIV NL eng J - Článek v odborném periodiku
Gazda, Daniel - Mareš, Jiří
Calculations of K- nuclear quasi-bound states based on chiral meson-baryon amplitudes.
Nuclear Physics. A. Roč. 881, 5/6 (2012), s. 159-168. ISSN 0375-9474. E-ISSN 1873-1554
Grant CEP: GA MŠMT(CZ) LG11005
Institucionální podpora: RVO:61389005
Klíčová slova: K- nuclear states * mesic nuclei * antikaon-nucleus interaction
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 1.525, rok: 2012 ; AIS: 0.626, rok: 2012
DOI: https://doi.org/10.1016/j.nuclphysa.2012.01.016

In-medium (K) over bar N scattering amplitudes developed within a new chirally motivated coupled-channel model due to Cieply and Smejkal that fits the recent SIDDHARTA kaonic hydrogen Is level shift and width are used to construct K- nuclear potentials for calculations of K- nuclear quasi-bound states. The strong energy and density dependence of scattering amplitudes at and near threshold leads to K- potential depths -Re V-K approximate to 80-120 MeV. Self-consistent calculations of all K- nuclear quasi-bound states, including excited states, are reported. Model dependence, polarization effects, the role of p-wave interactions, and two-nucleon K- NN -> YN absorption modes are discussed. The K- absorption widths Gamma(K) are comparable or even larger than the corresponding binding energies B-K for all K- nuclear quasi-bound states. exceeding considerably the level spacing. This discourages search for K- nuclear quasi-bound states in any but the lightest nuclear systems.
Trvalý link: http://hdl.handle.net/11104/0216142