Chiral SU(3) dynamics and the quasibound K – pp cluster
نویسندگان
چکیده
منابع مشابه
Chiral SU ( 3 ) dynamics and the quasibound K − pp cluster
The prototype of a K̄ nuclear cluster, K−pp, has been investigated using effective K̄N potentials based on chiral SU(3) dynamics. Variational calculation shows a bound state solution with shallow binding energy B(K−pp) = 20±3 MeV and broad mesonic decay width Γ (K̄NN → πY N) = 40 70 MeV. The K̄N(I = 0) pair in the K−pp system exhibits a similar structure as the Λ(1405). We have also estimated the d...
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Recent developments are summarised concerning low-energy K̄N interactions as they relate to the possible existence of antikaon-nuclear quasibound states. An exploratory study of antikaons bound to finite nuclei is performed, with emphasis on the evolution of such states from light to heavy nuclei (A = 16 208). The energy dependent, driving attractive K̄N interactions are constructed using the s-w...
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We perform a study of the final state interactions of the K+K̄0 and the K̄0d systems in the reactions pp → dK+K̄0 and pp → dπ+η. Since the two-meson system couples strongly to the a0(980) resonance, these reactions are expected to be an additional source of information about the controversial scalar sector. We also show that these reactions present peculiar features which can shed additional light...
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Previously, the near-threshold pp → ppπ 0 reaction was studied with the use of transition operators derived from chiral perturbation theory (χPT) and the nuclear wave functions generated by high-precision phenomenological potentials. A conceptual problem in that approach was that the transition amplitude receives contributions from very high momentum components (above the cutoff scale of χPT) i...
متن کاملThe reactions pp → p Λ K + and pp → p Σ 0 K + near their thresholds
The reactions pp → pΛK+ and pp → pΣ0K+ are studied near their thresholds. The strangeness production process is described by the πand K exchange mechanisms. Effects from the final state interaction in the hyperon-nucleon system are taken into account rigorously. It is found that the Λ production is dominated by K exchange whereas Kas well as π exchange play an important role for the Σ0 case. It...
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ژورنال
عنوان ژورنال: Hyperfine Interactions
سال: 2009
ISSN: 0304-3843,1572-9540
DOI: 10.1007/s10751-009-0007-8