Emission spectra and invariant masses of Lambda and p in the stopped-K-NN absorption process in 4He and 6Li

Physics – Nuclear Physics – Nuclear Experiment

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29 pages, 15 figures

Scientific paper

10.1016/j.nuclphysa.2007.05.014

We have calculated the emission spectra of Y and N and invariant masses of YN pairs in the direct K-NN --> YN absorption process at rest in 4He and light nuclei in order to provide theoretical tools for correct interpretations of experimental data with or without invoking kaonic nuclear bound states. All the momentum distributions are broad with widths around 150-200 MeV/c (except for the case of 6Li target), while the partial invariant mass of each YN pair has a peak around 2310-2330 MeV/c2. We argue against the interpretations of stopped-K- experimental data of KEK and FINUDA by Oset and Toki and by Magas, Oset, Ramos and Toki.

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