Multi-(K)over-bar hypernuclei

0333209 - ÚJF 2010 RIV US eng J - Journal Article
Gazda, D. - Friedman, E. - Gal, A. - Mareš, Jiří
Multi-(K)over-bar hypernuclei.
[Multi-antikaonová hyperjádra.]
Physical Review. C. Roč. 80, č. 3 (2009), 035205/1-035205/8. ISSN 0556-2813
R&D Projects: GA ČR GA202/09/1441
Institutional research plan: CEZ:AV0Z10480505
Keywords : MEAN-FIELD THEORY * IN-FLIGHT K * BOUND-STATES
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.477, year: 2009

Relativistic mean-field calculations of multi-(K) over bar hypernuclei are performed by adding K- mesons to particle-stable configurations of nucleons, Lambda and Xi hyperons. For a given hypernuclear core, the calculated (K) over bar separation energy B ((K)) over bar saturates with the number of (K) over bar mesons for more than roughly 10 mesons, with B ((K)) over bar bounded from above by 200 MeV. The associated baryonic densities saturate at values 2-3 times nuclear-matter density within a small region where the (K) over bar -meson densities peak, similarly to what was found for multi-(K) over bar nuclei. The calculations demonstrate that particle-stable multistrange {N, Lambda, Xi} configurations are stable against strong-interaction conversions Lambda -> N (K) over bar and Xi -> N (K) over bar(K) over bar, confirming and strengthening the conclusion that kaon condensation is unlikely to occur in strong-interaction self-bound strange hadronic matter.

Relativistické výpočty multi-anti-K hyperjader byly prováděny metodou středního pole, přidáním K-mesonů k částicově stabilním konfiguracím nukleonů, Lambda a Xi hyperonů. Pro dané jadérko hyperjádra se spočtené separační energie antikoanu B(K) saturují vzhledem k počtu anti-K mesonů zhruba od 10 mesonů. Baryonová hustota sse saturuje na hodnotách 2-3 krát větších než běžná jaderná materie.
Permanent Link: http://hdl.handle.net/11104/0178253