Observation of Direct CP Violation in Kaon Decays

  • Konrad Kleinknecht
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 616)


A small matter-antimatter asymmetry of the weak force was experimentally established. This CP violation may be related to the small excess of matter from the big bang. The nature of CP violation in the K0 system has been clarified after 37 years of experimentation: it is due to a small part of the weak interaction (“milliweak interaction”). A non-trivial phase in the weak quark mixing matrix generates “direct CP violation” in the weak Hamiltonian. The experiments demonstrating direct CP violation are discussed.


Electromagnetic Calorimeter Drift Chamber Hadronic Matrix Element Double Ratio Kaon Decay 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    G. Lüders, Kgl. Danske Videnskab. Selskab, Matfys. Medd. 28, 1 (1954).Google Scholar
  2. 2.
    W. Pauli, in Niels Bohr and the Development of Physics, ed. W. Pauli, p. 30. (Oxford: Pergamon, 1955).Google Scholar
  3. 3.
    T. D. Lee, C. N. Yang, Phys. Rev. 104, 254 (1956).CrossRefADSGoogle Scholar
  4. 4.
    L. D. Landau, Nucl. Phys. 3, 127 (1957).CrossRefGoogle Scholar
  5. 5.
    M. Gell-Mann, A. Pais, Phys. Rev. 97, 1387 (1955).CrossRefADSMathSciNetGoogle Scholar
  6. 6.
    J. H. Christenson, J. W. Cronin, V. L. Fitch, R. Turlay, Phys. Rev. Lett. 13, 138 (1964).CrossRefADSGoogle Scholar
  7. 7.
    J. M. Gaillard et al., Phys. Rev. Lett. 18, 20 (1967) J. W. Cronin et al., Phys. Rev. Lett. 18, 25 (1967).CrossRefADSGoogle Scholar
  8. 8.
    S. Bennett et al., Phys. Rev. Lett. 19, 993 (1967) D. Dorfan et al., Phys. Rev. Lett. 19, 987 (1967).CrossRefADSGoogle Scholar
  9. 9.
    Reviewed in K. Kleinknecht, Ann. Rev. Nucl. Sci. 26, 1 (1976).CrossRefADSGoogle Scholar
  10. 10.
    K. Kleinknecht, Proc. 17th Int. Conf. High Energy Phys., ed. J.R. Smith (Chilton, Didcot, UK 1974), p.III–23.Google Scholar
  11. 11.
    L. Wolfenstein, Phys. Rev. Lett. 13, 562 (1964).CrossRefADSGoogle Scholar
  12. 12.
    M. Kobayashi, T. Maskawa, Prog. Theor. Phys. 49, 652 (1973); N. Cabibbo, Phys. Rev. Lett. 10, 531 (1963).CrossRefADSGoogle Scholar
  13. 13.
    N. N. Biswas et al., Phys. Rev. Lett. 47, 1378 (1981) and priv. comm. to W. Ochs.CrossRefADSGoogle Scholar
  14. 14.
    W. Ochs, priv. comm. from analysis of CERN-Munich data.Google Scholar
  15. 15.
    T. Hambye, G. O. Köhler, E. A. Paschos, P. H. Soldan, hep-ph/9906434.Google Scholar
  16. 16.
    A. J. Buras, M. Gorbahn, S. Jäger, M. Jamin, M. E. Lautenbacher, L. Silvestrini, hep-ph/9904408, hep-ph/9908395.Google Scholar
  17. 17.
    G. Martinelli, Presentation at Kaon99, Chicago,
  18. 18.
    S. Bertolini, M. Fabbrichesi, J. O. Eeg, hep-ph/9802405.Google Scholar
  19. 19.
    H. Burkhardt et al., Phys. Lett. B 206, 169 (1988).CrossRefADSGoogle Scholar
  20. 20.
    G.D. Barr et al., Phys. Lett. B 317, 233 (1993).CrossRefADSGoogle Scholar
  21. 21.
    L.K. Gibbons et al., Phys. Rev. Lett. 70, 1203 (1993).CrossRefADSMathSciNetGoogle Scholar
  22. 22.
    A. Alavi-Harati et al., Phys. Rev. Lett. 83, 22 (1999).CrossRefADSGoogle Scholar
  23. 23.
    V. Fanti et al., Phys. Lett. B 465, 335 (1999).CrossRefADSGoogle Scholar
  24. 24.
    A. Lai et al., A precise measurement of the direct CP violation parameter Re(έ/ε), Eur. Phys. J. C 22, 231 (2001).CrossRefADSGoogle Scholar
  25. 25.
    W. Buchmüller, Ann. Phys. (Leipzig) 10, 95 (2001)zbMATHCrossRefADSGoogle Scholar

Copyright information

© Springer-VerlagBerlin Heidelber 2003

Authors and Affiliations

  • Konrad Kleinknecht
    • 1
  1. 1.Institut für PhysikJohannes Gutenberg-UniversitätMainz

Personalised recommendations