| 日時: |
2007-05-11 16:00 - 17:00 |
| 場所: |
研究本館3階321室 |
| 会議名: |
Strange dibaryon resonance in the anti-K N N -- pi Sigma N system |
| 連絡先: |
津田 |
| 講演者: |
池田 陽一 (大阪大学) |
| 講演言語: |
日本語 |
| アブストラクト: |
Three-body resonances in the \bar{K}NN system have been studied
within a framework of the \bar{K}NN-\pi\Sigma N coupled channel Faddeev equation.
By solving the three-body equation the energy dependence of
the resonant \bar{K}N amplitude is fully taken into account.
The S-matrix pole has been investigated from the eigenvalue of the kernel
with the analytic continuation of the scattering amplitude
on the unphysical Riemann sheet.
The \bar{K}N interaction is constructed from the leading order term
of the chiral Lagrangian using relativistic kinematics.
The \Lambda(1405) resonance is dynamically generated in this model,
where the \bar{K}N interaction parameters are
fitted to the data of scattering length.
As a result we find a three-body resonance of the strange dibaryon system
with binding energy, 80 MeV, and width, 73$ MeV.
The energy of the three-body resonance is found to be
sensitive to the model of the $I=0$ \bar{K}N interaction.
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