Evidence for resonant structures in the [formula omitted] system

An analysis of the Λ pp system produced forward in the reaction K p → Λ pp at 18.5 GeV/ c is presented. The data come from an experiment using the CERN Ω′ spectrometer. Structures are observed in the Λ p mass spectrum and in the double moments H LMlm describing the decay of the Λ p system and the su...

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Published in:Nuclear physics. B 1983-11, Vol.227 (3), p.365-386
Main Authors: Armstrong, T, Baubillier, M, Bloodworth, I.J, Bonesini, M, Brient, J.C, Burns, A, Calligarich, E, Carney, J.N, Cecchet, G, Costa, G, Dolfini, R, Evangelista, G, Ghidini, B, Kinson, J.B, Knudson, K, Lenti, V, Mandelli, L, Navach, F, Palano, A, Perini, L, Pons, Y, Quercigh, E, Strachman, Z, Tamborini, M, Zito, G, Zitoun, R
Format: Article
Language:English
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Summary:An analysis of the Λ pp system produced forward in the reaction K p → Λ pp at 18.5 GeV/ c is presented. The data come from an experiment using the CERN Ω′ spectrometer. Structures are observed in the Λ p mass spectrum and in the double moments H LMlm describing the decay of the Λ p system and the subsequent Λ decay, for L ⩽ 8. A partial wave analysis interprets these structures as resonances of spin parities 2 − and 3 +, masses and widths M = 2200 ± 40 MeV, Γ = 150 ± 30 MeV and M = 2330 ± 40 MeV, Γ = 150 ± 30 MeV respectively.
ISSN:0550-3213
1873-1562
DOI:10.1016/0550-3213(83)90564-3