## Abstract

We study the resonance energy of the strange dibaryons using two models with the energy-independent and energy-dependent potentials for the s-wave K̄N interaction, both of which are derived by certain reductions from the leading order term of the effective chiral Lagrangian. These potential models produce rather different off-shell behaviors of the two-body K̄N - πnΣ amplitudes in J = 0 channel, i.e., the model with energy-independent (energy-dependent) potential predicts one (two) resonance pole in the Λ1(1405) region, while they describe the available data equally well. We find that the energy-independent potential model predicts one resonance pole of the strange dibaryons, whereas the energy-dependent potential model predicts two resonance poles: one is the shallow quasi-bound state of the K̄NN, and the other is the resonance of the πtYN with large width. An investigation of the binding energy of the strange dibaryons will make a significant contribution to clarify resonance structure of s-wave K̄N - πΣ around the Λ(1405) region.

Original language | English |
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Pages (from-to) | 533-539 |

Number of pages | 7 |

Journal | Progress of Theoretical Physics |

Volume | 124 |

Issue number | 3 |

DOIs | |

Publication status | Published - Sept 2010 |

Externally published | Yes |

## All Science Journal Classification (ASJC) codes

- Physics and Astronomy (miscellaneous)