Different Properties of the $$\varvec{\bar{K}NN}$$ K ¯ N N and $$\varvec{\bar{K}\bar{K}N}$$ K ¯ K ¯ N Systems

Abstract

A series of exact or accurate three-body calculations of different properties of the \(\bar{K}NN\) and \(\bar{K}\bar{K}N\) systems is described. In particular, binding energies and widths of the quasi-bound states in the systems were calculated. Near-threshold elastic \(K^- d\) amplitudes were also found together with the 1s level shift and width of kaonic deuterium. Different dependences of the three-body results on two-body inputs are discussed.