$K^{-}pp$ system with chiral SU(3) effective interaction

Abstract

The $K^{-}pp$ system is investigated using a variational approach with realistic two-body interactions: the Argonne v18 $NN$ potential and an energy dependent $\bar{K}N$ effective interaction derived from chiral SU(3) coupled-channel dynamics. Uncertainties in subthreshold extrapolations of the $\bar{K}N$ interaction are considered. A weakly bound $K^{-}pp$ state is found, with a binding energy $B=(19\pm 3)$ MeV substantially smaller than suggested in previous calculations. The decay width $\Gamma (K^{-}pp\to \pi \Sigma N)$ is estimated to range between about 40 and 70 MeV.

11 pages, submitted to Nuclear Physics A

References in corpus (5)

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

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• On the nature of the $\Lambda (1405)$ and $\Lambda (1670)$ from their $N_c$ behavior in chiral dynamics
• Lambda(1405) in chiral SU(3) dynamics
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