Abstract
The prototype of a K ¯ nuclear cluster, K − p p , has been investigated using effective K ¯ N potentials based on chiral SU(3) dynamics. Variational calculation shows a bound state solution with shallow binding energy B ( K − p p ) = 20 ± 3 MeV and broad mesonic decay width Γ ( K ¯ N N → π Y N ) = 40 − 70 MeV . The K ¯ N ( I = 0 ) pair in the K − p p system exhibits a similar structure as the Λ ( 1405 ) . We have also estimated the dispersive correction, p-wave K ¯ N interaction, and two-nucleon absorption width.
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