An I = 1 enhancement at a mass of 1550 MeV in the (Λπ) and (Σπ)-systems期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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An I = 1 enhancement at a mass of 1550 MeV in the (Λπ) and (Σπ)-systems

Authors:	C Dionisi R Armenteros J Diaz Ph Gavillet JB Gay A Gurtu RJ Hemingway M Mazzucato P Trepagnier R Blokzijl GGG Massaro B Jongejans J Engelen JJ Timmermans RT Van De Walle B Foster PR Lamb WL McDowell

Institution:	CERN, European Organization for Nuclear Research, Geneva, Switzerland;Nuclear Physics Laboratory, University of Oxford, Oxford, UK

Abstract:	Evidence is presented for an I = 1 enhancement observed in the reactions K^?p→Λ(Σ)K⁰₁K^±π^? at $4.2 GeV c$ inciden momentum. The mass and width of the proposed new Y¹ are, respectively, (1553 ± 7) MeV) and (80 ± 30) MeV. A decay branching ratio $Σπ (Σπ + Λπ) = (35 ± 12)%$ is also obtained.

Keywords:	Amsterdam-CERN-Nijmegen-Oxford Collaboration
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