Measurements of the Tau-Neutrino Mass

  • K. R. Schubert
Conference paper


The tau lepton has been disovered 1975 at the e+e storage ring SPEAR at Stanford [1] and has been confirmed soon afterwards at the DORIS ring at DESY. All experimental studies of the τ and its neutrino v τ have been performed at e + e storage rings, in addition to the two above also at CESR (Cornell), PETRA (DESY), and PEP (Stanford). The r is found to be a pointlike spin-1/2 particle with mass (1784 ± 3) MeV [2]. Its production cross section is shown in fig. 1, and with the known integrated luminosities of the five storage rings over the last 12 years we estimate that the world production of τ leptons has been about 3 · 106 so far.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    M. Perl et al, Phys.Rev.Lett. 35(1975)1489.ADSCrossRefGoogle Scholar
  2. 2.
    Particle Data Group, Phys.Lett. 170B(1986)l.Google Scholar
  3. 3.
    H.J. Gerber, Proc. Int. Europhysics Conf. on High Energy Physics, Uppsala 1987.Google Scholar
  4. 4.
    W. Bacino et al (DELCO), Phys.Rev.Lett 42(1979)749.ADSCrossRefGoogle Scholar
  5. 5.
    CA. Blocker et al (MARK II), Phys.Lett. 109B(1982)119.ADSGoogle Scholar
  6. 6.
    C. Matteuzzi et al (MARK II), Phys.Rev.Lett. 52(1984)1869.ADSCrossRefGoogle Scholar
  7. 7.
    G.B. Mills et al (DELCO), Phys.Rev.Lett. 54(1985)624.ADSCrossRefGoogle Scholar
  8. 8.
    C. Matteuzzi et al (MARK II), Phys.Rev. D32(1985)800.ADSGoogle Scholar
  9. 9.
    P.R. Burchat et al (MARK II), Phys.Rev.Lett. 54(1985)2489.ADSCrossRefGoogle Scholar
  10. 10.
    H. Albrecht et al (ARGUS), Phys.Lett. 163B(1985)404.ADSGoogle Scholar
  11. 11.
    S. Abachi et al (HRS), Phys.Rev.Lett. 56(1986)1039.ADSCrossRefGoogle Scholar
  12. 12.
    S.E. Csorna et al (CLEO), Phys.Rev. D35(1987)2747.ADSGoogle Scholar
  13. 13.
    S. Abachi et al (HRS), Phys.Rev. D35(1987)2880.ADSGoogle Scholar
  14. 14.
    B. Spaan (ARGUS), Proc. 2nd Int. Symp. on Production and Decay of Heavy Flavous, Stanford 1987.Google Scholar
  15. 15.
    H. Albrecht et al (ARGUS),“;An improved upper limit on the v τ mass from the decay τ → ÀÀÀÀ+À+ ”.Google Scholar
  16. 17.
    .S. Tsai, Phys.Rev. D4(1971)2821.ADSGoogle Scholar
  17. 18.
    e.g. M. Gell-Mann et al, in “Supergravity”, ed. by P. van Nieuwenkinsen, North-Holland 1979, p. 315.Google Scholar
  18. 19.
    M. Pritschi et al (SIN), Phys.Lett. 173B(1986)485.ADSGoogle Scholar
  19. 20.
    R. Eichler et al, “Motivation and Design Study for a B-Meson Factory”, SIN-PR-86-13(1986), unpublished.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • K. R. Schubert
    • 1
  1. 1.Institut für HochenergiephysikUniversität HeidelbergHeidelbergGermany

Personalised recommendations