Λ(1405) as a K¯N Feshbach resonance in the Skyrme model

@article{Ezoe20201405A,
  title={$\Lambda$(1405)
 as a 
K¯N
 Feshbach resonance in the Skyrme model},
  author={Takashi Ezoe and Atsushi Hosaka},
  journal={Physical Review D},
  year={2020}
}
We describe the Lambda(1405) hyperon as a Feshbach resonance of a bar-KN quasi-bound state coupled by a decaying channel of pi Sigma in the Skyrme model. A weakly bound bar-KN state is generated in the laboratory frame, while the Sigma hyperon as a strongly bound state of bar-KN in the intrinsic frame. We obtain a coupling of bar-KN and pi Sigma channels by computing a baryon matrix element of the axial current. This coupling enables the decay of the bar-KN bound state to pi-Sigma . It is shown… Expand
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