Zeitschrift für Physik C Particles and Fields

, Volume 48, Issue 3, pp 445–452 | Cite as

τ Decays to pions

  • J. H. Kühn
  • A. Santamaria


Semileptonic τ decays to two and three pions are considered. Based on recent data for the pion form factor a new prediction for Γ(τ→vπ-0)/Γ(τ→veve) of 1.32±0.05 is derived. The chiral model-supplemented by vector dominance-is used to predict rate and differential distributions for the three pion mode in good agreement with present data. The parity violating asymmetry which has been predicted theoretically and observed experimentally is studied and found to be fairly insensitive towards the details of the model for the hadronic decays.


Field Theory Elementary Particle Quantum Field Theory Form Factor Particle Acceleration 
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  1. 1.
    M. Perl et al.: Phys. Rev. Lett. 35 (1975) 1489Google Scholar
  2. 2.
    M. Perl: Review presented at the XIV Lepton Photon Conf. Stanford 1989; C. Kiesling, In: High Energy Electron Positron Physics. A. Ali, P. Söding (eds.) Singapore: World Scientific 1988Google Scholar
  3. 3.
    H.B. Thacker, J.J. Sakurai: Phys. Lett. 36B (1971) 103Google Scholar
  4. 4.
    Y.S. Tsai: Phys. Rev. D4 (1971) 2821Google Scholar
  5. 5.
    F.J. Gilman, D.H. Miller: Phys. Rev. D17 (1978) 1846; F.J. Gilman, S.H. Rhie: Phys. Rev. D31 (1985) 1066Google Scholar
  6. 6.
    R. Fischer, J. Wess, F. Wagner: Z. Phys. C—Particles and Fields 3 (1980) 313Google Scholar
  7. 7.
    J.H. Kühn, F. Wagner: Nucl. Phys. B236 (1984) 16Google Scholar
  8. 8.
    L.M. Barkov et al.: Nucl. Phys. B256 (1985) 365Google Scholar
  9. 9.
    ARGUS-Coll.: Preliminary results presented by A. Walther at the DPG-meeting, Hamburg, 23.3.1990Google Scholar
  10. 10.
    G. Gounaris, J.J. Sakurai: Phys. Rev. Lett. 21 (1968) 244Google Scholar
  11. 11.
    Z.Y. Fang, G. Lopez Castro, J. Pestieau: Nuovo Cimento 100 (1988) 155Google Scholar
  12. 12.
    M.G. Bowler: Phys. Lett. 182B (1986) 400Google Scholar
  13. 13.
    A. Pich: QCD tests from tau-decay data. Proceedings of the τ-charm Factory Workshop, SLAC Report-343, p. 416 (1989)Google Scholar
  14. 14.
    V. Chabaud et al.: Nucl. Phys. B223 (1983) 1Google Scholar
  15. 15.
    Particle data group: Phys. Lett. 204B (1988) 1Google Scholar
  16. 16.
    B. Costa de Beauregard et al.: Phys. Lett. 67B (1977) 213; A. Quenzer et al.: Phys. Lett. 76B (1978) 512Google Scholar
  17. 17.
    W.R. Frazer, J.R. Fulco, F.R. Halpern: Phys. Rev. B136 (1964) 1207Google Scholar
  18. 18.
    N.A. Thornquist: Z. Phys. C—Particles and Fields 36 (1987) 695Google Scholar
  19. 19.
    ARGUS Coll. H. Albrecht et al.: Z. Phys. C—Particles and Fields 33 (1986) 7Google Scholar
  20. 20.
    H. Kolanoski: private communicationGoogle Scholar
  21. 21.
    MAC Coll. H.R. Band et al.: Phys. Rev. 198B (1987) 297Google Scholar

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • J. H. Kühn
    • 1
  • A. Santamaria
    • 1
  1. 1.Max-Planck-Institut für Physik und AstrophysikMünchen 40Federal Republic of Germany

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