A new upper limit for the branching ratio (Ξ? → nπ?)(Ξ? → Λπ?)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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A new upper limit for the branching ratio (Ξ? → nπ?)(Ξ? → Λπ?)

Authors:	SF Biagi M Bourquin AJ Britten RM Brown H Burckhart AA Carter JR Carter Ch Doré P Extermann M Gailloud CNP Gee WM Gibson JC Gordon RJ Gray P Igo-Kemenes WC Louis T Modis P Mühlemann R Weill

Institution:	1. Queen Mary College, University of London, England;2. Université de Genève, Switzerland;3. Rutherford Appleton Laboratory, England;4. Physikalisches Institut, Universität Heidelberg, Fed. Rep. Germany;5. University of Cambridge, England;6. Université de Lausanne, Switzerland;7. H.H. Wills Laboratory, University of Bristol, England

Abstract:	From a sample of 735 000 Ξ^? decays, we have obtained a new upper limit for the branching ratio $(Ξ^{?} → n π^{?}) (Ξ^{?} → Λπ^{?})$ . The result is 1.9 × 10^?5 at the 90% confidence level.

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