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

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

Authors:	S.F. Biagi M. Bourquin A.J. Britten R.M. Brown H. Burckhart A.A. Carter J.R. Carter Ch. Doré P. Extermann M. Gailloud C.N.P. Gee W.M. Gibson J.C. Gordon R.J. Gray P. Igo-Kemenes W.C. Louis T. Modis P. Mühlemann R. Weill

Affiliation:	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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