Tuesday, February 12, 2013

1302.2301 (Shota Ohnishi et al.)

Signature of strange dibaryons in kaon- and photon-induced reactions    [PDF]

Shota Ohnishi, Yoichi Ikeda, Hiroyuki Kamano, Toru Sato
We examine how the signature of the strange dibaryon resonances shows up in scattering amplitudes and observables of the three-body $\bar{K}NN$-$\pi Y N (Y=\Sigma, \Lambda)$ 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 $\bar{K}N$-$\pi \Sigma$ subsystem, both of which reproduce the available data equally well but give quite a different resonance-pole structure for $\Lambda(1405)$, we also investigate whether the strange-dibaryon production reactions can be used for disentangling the nature of $\Lambda(1405)$.
View original: http://arxiv.org/abs/1302.2301

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