Continuum ppΛ spectrum of the He3(K−,π−) reaction with continuum discretized coupled channels

We theoretically investigate an inclusive π−π− spectrum of a He3(K−,π−) reaction at 870 MeV/c in a distorted-wave impulse approximation using the continuum discretized coupled channels (CDCC) method, in order to well describe the pp   continuum states above the p+p+Λp+p+Λ breakup threshold. We calculate the continuum ppΛ states applying the multichannel Green's function with a microscopic 2N–Λ folding-model potential constructed by the CDCC wavefunctions. The results show that the calculated spectra reproduce available experimental data, and that the pp   continuum states lying in higher energies are needed to fully describe these spectra, depending on the momentum transfer in the (K−,π−K−,π−) reaction. It is shown that this calculation provides the ability of describing three-body ppΛ   breakup systems for the (K−,π−K−,π−) spectra.