Chiral SU(3) Dynamics and Antikaon-Nuclear quasibound States

Abstract

Recent developments are summarised concerning low-energy KbarN 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 KbarN interactions are constructed using the s-wave coupled-channel amplitudes involving the Lambda(1405) and resulting from chiral SU(3) dynamics, plus p-wave amplitudes dominated by the Sigma(1385). Effects of Pauli and short-range correlations are discussed. The decay width induced by K^-NN two-body absorption is estimated and found to be substantial. It is concluded that Kbar-nuclear quasibound states can possibly exist with binding energies ranging from 60 to 100 MeV, but with short life times corresponding to decay widths of the similar magnitudes.

References in corpus (7)

• In-medium nuclear interactions of low-energy hadrons
• Effective Kbar N interaction based on chiral SU(3) dynamics
• Strange dibaryon resonance in the anti-KNN--piYN system
• The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
• $\bar{K}NN$ quasi-bound state and the $\bar{K}N$ interaction: coupled-channel Faddeev calculations of the $\bar{K}NN-\pi \Sigma N$ system
• $K^{-}pp$ system with chiral SU(3) effective interaction
• Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction

Cited by in corpus (2)

• $K^{-}pp$ system with chiral SU(3) effective interaction
• Multi-$\bar{K}$ nuclei and kaon condensation