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Determination of the elementsV us andV ud of the Kobayashi-Maskawa matrix

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Zeitschrift für Physik C Particles and Fields

Abstract

We discuss the theoretical problems encountered in the standard evaluations of the Cabibbo angle and show that the data onK e3 and hyperon decays require |V us |=0.221±0.002. With this value unitary of the K-M-Matrix predicts |V ud |=0.9753±0.0005. The ratio of pseudoscalar decay constants is found to beF K /F π=1.22±0.01.

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Author notes

  1. H. Leutwyler

    Present address: Institut für theoretische Physik, Sidlerstrasse 5, CH-3012, Bern

Authors and Affiliations

  1. CERN, CH-1211, Geneva 23, Switzerland

    H. Leutwyler

  2. CERN, Geneva and Department of High Energy Physics, University of Helsinki, SF-00170, Helsinki, Finland

    M. Roos

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  1. H. Leutwyler
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  2. M. Roos
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Leutwyler, H., Roos, M. Determination of the elementsV us andV ud of the Kobayashi-Maskawa matrix. Z. Phys. C - Particles and Fields 25, 91–101 (1984). https://doi.org/10.1007/BF01571961

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  • DOI: https://doi.org/10.1007/BF01571961

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