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arXiv · 1302.2301

Signature of strange dibaryons in kaon- and photon-induced reactions

Shota Ohnishi·Yoichi Ikeda·Hiroyuki Kamano·Toru Sato
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Abstract

We examine how the signature of the strange dibaryon resonances shows up in scattering amplitudes and observables of the three-body $\bar{K}NN$-$πY N (Y=Σ, Λ)$ system on the physical real energy axis. The so-called point method is applied to handle logarithmic singularities that appear in solving the Alt-Grassberger-Sandhas equations for the real scattering energies. By taking two different kinds of models for the two-body $\bar{K}N$-$πΣ$ subsystem, both of which reproduce the available data equally well but give quite a different resonance-pole structure for $Λ(1405)$, we also investigate whether the strange-dibaryon production reactions can be used for disentangling the nature of $Λ(1405)$.

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Shota Ohnishi, Yoichi Ikeda, Hiroyuki Kamano, Toru Sato. 2013-08-09. Signature of strange dibaryons in kaon- and photon-induced reactions. https://doi.org/10.1103/physrevc.88.025204

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