Theoretical study of the and resonances in decays

Miyahara, Kenta*; Hyodo, Tetsuo*; Oka, Makoto   ; Nieves, J.*; Oset, E.*

Nonleptonic weak decays of into and a meson-baryon final state, , are analyzed from the viewpoint of probing baryon resonances, i.e. and . We argue that the weak decay of is dominated by a single quark-line diagram. The decay process has an advantage of being free from meson resonances in the invariant mass distribution. The invariant mass distribution of the meson-baryon final state is calculated, assuming that the and resonances have . It is found that a clear peak for the is seen in the and spectra. We also suggest that the ratios of the , and final states are useful to distinguish whether the peak is originated from the resonance or it is a threshold effect.