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Backward production of a spin-parity 1+ Kϱ resonance at 1.28 GeV |
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| Authors: | Ph Gavillet J Diaz C Dionisi A Gurtu RJ Hemingway MJ Losty JC Marin M Mazzucato L Montanet E Pagiola R Blokzijl B Jongejans GGG Massaro H Voorthuis JJ Engelen W Kittel JS Vergeest WL McDowell |
| Institution: | CERN, Geneva, Switzerland;Nuclear Physics Laboratory, University of Oxford, Oxford, UK |
| Abstract: | A (Kππ)+ mass enhancement is observed in the reactions K?p → Ξ ?Ko+π+πo? when events with a small (K? → Ξ?) four momentum transfer squared are selected. The signal is also visible in the reaction K?p → Ξ?π++ neutrals. The enhancement, centered at 1.28 GeV, is seen to decay preferentially into K? with spin-parity JP = 1+. The cross section for K?p→ Ξ?C+(1.28) with C+ → K? at 4.15 GeV/c incident K? momentum is (6.2 ± 0.6) μb. |
| Keywords: | Amsterdam-CERN-Nijmegen-Oxford Collaboration |
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