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

Abstract

We examine how the signature of the strange dibaryon resonances shows up in scattering amplitudes and observables of the three-body $\bar{K}NN$-$\pi YN(Y=\Sigma ,\Lambda )$ 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 $\Lambda (1405)$.

28 pages, 15 figures

References in corpus (14)

• Effective Kbar N interaction based on chiral SU(3) dynamics
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Strange dibaryon resonance in the anti-KNN--piYN system
• Variational calculation of the ppK^- system based on chiral SU(3) dynamics
• Indication of a deeply bound compact K-pp state formed in the pp -> p Lambda K+ reaction at 2.85 GeV
• $\bar{K}NN$ quasi-bound state and the $\bar{K}N$ interaction: coupled-channel Faddeev calculations of the $\bar{K}NN-\pi \Sigma N$ system
• The basic K nuclear cluster K- pp and its enhanced formation in the p + p -> K+ + X reaction
• $K^{-}pp$ system with chiral SU(3) effective interaction
• Realistic calculations of Kbar-N-N, Kbar-N-N-N, and Kbar-Kbar-N-N quasibound states
• Energy dependence of barKN interactions and resonance pole of strange dibaryons
• Resonance energy of the barKNN-piYN system
• Variational calculations for K-few-nucleon systems
• Formation spectra of light kaonic nuclei by in-flight ($\bar{K},N$) reactions with chiral unitary amplitude

Cited by in corpus (8)

• Antikaon-nucleon interaction and Lambda(1405) in chiral SU(3) dynamics
• Few-body approach to structure of $\bar{K}$-nuclear quasi-bound states
• Structure of the $\Lambda (1405)$ and the $K^{-}d\to \pi \Sigma n$ reaction
• Faddeev approach to the reaction $K^{-}d\to \pi \Sigma n$ at $p_K=1$ GeV/c
• Structure, formation and decay of $\bar{K}NN$ system by Faddeev-AGS calculations
• What We Know About the Lambda(1405)
• $K^{-}d\to \pi \Sigma n$ reactions and structure of the $\Lambda (1405)$
• Structure of $\Lambda$(1405) resonance and $\gamma p\to K^{+}+(\pi \Sigma {)}^0$ reaction