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Determination of the α parameter for the decay Ξ− → Λπ− |
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| Authors: | S.F. Biagi M. Bourquin A.J. Britten R.M. Brown H. Burchhart 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, UK;2. Université de Géneve, Switzerland;3. Rutherford Appleton Laboratory, UK;4. Physikalisches Institut, Universität Heidelberg, Fed. Rep. Germany;5. University of Cambridge, UK;6. Université de Lausanne, Switzerland;7. H.H. Wills Physics Laboratory, University of Bristol, UK |
| Abstract: | The α parameter for Ξ? → Λπ? decay has been determined to be αΞ?=?0.462 ± 0.015, from a sample of 1.5 × 105 events recorded in the CERN SPS hyperon beam. This value is 2.5 standard deviations higher than the current world average. |
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