Abstract
We present here some results supporting the nature of the Λ(1405) resonance as dynamically generated from the meson baryon interaction in coupled channels and resulting from the superposition of two close-by poles. We find support for this picture in the K − p → π 0 π 0 Σ 0 reaction, which shows a different shape than the one obtained from the π − p → K 0 πΣ reaction. We also call the attention to the K − p → γπΣ with πΣ in the Λ(1405) region, which shows a narrow peak in the calculations around 1420 MeV. We also report on recent calculations of the radiative decay of the two Λ(1405) states and on reactions to obtain information on these decay modes. Finally, we present results for the pp → pK + Λ(1405) reaction recently measured at ANKE/COSY and compare them with theoretical results.
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Oset, E., Geng, L.S., Döring, M. (2008). The nature of the Λ(1405). In: Hammer, HW., Kleber, V., Thoma, U., Schmieden, H. (eds) NSTAR 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85144-8_19
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DOI: https://doi.org/10.1007/978-3-540-85144-8_19
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