Calculation of a Λp invariant-mass distribution in the reaction K-d→π-Λp

The Λp invariant-mass distribution in the reaction K-d→π-Λp, which is observed by Cline et al., has two enhancements: just below the ΣN threshold and just above the ΛN threshold. The Λp invariant mass distribution has been calculated with the two-channel formalism. It has been well discussed in a previous paper that the enhancement just below the ΣN threshold is mainly due to a Λp resonance. In the previous paper, the enhancement just above the ΛN threshold was interpreted as the two-channel final state interaction or a Λp final state interaction associated with the ΣΛ conversion process. The physical meaning is intensively discussed in this paper. In fact, it is clearly shown in this paper, that the effect due to the ΣΛ conversion process is in the enhancement just above the ΛN threshold. If the experimental data should be interpreted by the two-step process K-d→π-(ΣN)→π-Λp, the effect due to the ΣΛ conversion process should have appeared in the experimental data, although some experimental data do not show the enhancement just above the ΛN threshold. (Auth.)