Advertisement

Zeitschrift für Physik C Particles and Fields

, Volume 3, Issue 3, pp 193–198 | Cite as

Spin parity analysis of the decay τ→νρπ

  • PLUTO Collaboration
  • W. Wagner
  • G. Alexander
  • L. Criegee
  • H. C. Dehne
  • R. Devenish
  • G. Flügge
  • J. D. Fox
  • G. Franke
  • Ch. Gerke
  • E. Hackmack
  • P. Harms
  • Th. Kahl
  • G. Knies
  • E. Lehmann
  • R. Schmitz
  • U. Timm
  • P. Waloschek
  • G. G. Winter
  • W. Zimmermann
  • V. Blobel
  • A. F. Garfinkel
  • B. Koppitz
  • W. Lührsen
  • A. Bäcker
  • J. Bürger
  • K. Derikum
  • C. Grupen
  • H. Meyer
  • M. Rössler
  • K. Wacker
Article

Abstract

We have studied the τ→νρ0π decay in data taken with the PLUTO detector at the DORISe+e storage ring, at CM energies from 4 to 5 GeV. We have found 27 events with the τ→νρ0π decay mode corresponding to a branching ratio ofB=(5.4±1.7)%. The Dalitz plot and theρ0π mass spectrum are analysed for the ρπ partial wave and spin state. Only theρ0πs-wave as produced by the axial vector current gives a good description. Theρ0π mass spectrum is suggestive of anA1 resonance. An upper limit on τ±±π+π withoutρ0 formation is given.

Keywords

Mass Spectrum Field Theory Elementary Particle Quantum Field Theory Spin State 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    PLUTO collaboration, G. Alexander et al.: Phys. Lett.73B, 99 (1978)Google Scholar
  2. 2.
    Y. S. Tsai: Phys. Rev. D4, 2821 (1971);Google Scholar
  3. 2a.
    H. B. Thacker, J. J. Sakurai: Phys. Lett.36B, 103 (1971)Google Scholar
  4. 3.
    S. Weinberg: Phys. Rev.112, 1375 (1958)Google Scholar
  5. 4.
    W. Wagner: Thesis, RWTH Aachen internal report PITHA 78/01 (unpublished)Google Scholar
  6. 5.
    PLUTO collaboration, J. Burmester et al.: Phys. Lett.68B, 297 (1977); Phys. Lett.68B, 301 (1977)Google Scholar
  7. 6.
    H. Goldberg, R. Aaron: Phys. Lett.42, 339 (1979)Google Scholar
  8. 7.
    DASP Collaboration, R. Brandelik et al.: Phys. Lett.70B, 125 (1977);Google Scholar
  9. 7a.
    F. B. Heile et al.: Nucl. Phys. B138, 189 (1978)Google Scholar
  10. 8.
    G. J. Feldman: SLAC-PUB-2230 (1978); we use the average ofB e andB μ.Google Scholar
  11. 8a.
    G. Flügge: DESY report 79/37 (1979); Proc. of the Int. Conf. on High Energy Physics, Geneva, June 27–July 4, 1979 (to be published)Google Scholar
  12. 9.
    R. H. Dalitz: Phil. Mag.44, 1068 (1953)Google Scholar
  13. 10.
    W. R. Frazer, J. R. Fulco, F. R. Halpern: Phys. Rev.136B, 1207 (1964)Google Scholar
  14. 11.
    N. Kawamoto, Z. Rek: (private communication)Google Scholar

Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • PLUTO Collaboration
  • W. Wagner
    • 1
  • G. Alexander
    • 2
  • L. Criegee
    • 2
  • H. C. Dehne
    • 2
  • R. Devenish
    • 2
  • G. Flügge
    • 2
  • J. D. Fox
    • 2
  • G. Franke
    • 2
  • Ch. Gerke
    • 2
  • E. Hackmack
    • 2
  • P. Harms
    • 2
  • Th. Kahl
    • 2
  • G. Knies
    • 2
  • E. Lehmann
    • 2
  • R. Schmitz
    • 2
  • U. Timm
    • 2
  • P. Waloschek
    • 2
  • G. G. Winter
    • 2
  • W. Zimmermann
    • 2
  • V. Blobel
    • 3
  • A. F. Garfinkel
    • 3
  • B. Koppitz
    • 3
  • W. Lührsen
    • 3
  • A. Bäcker
    • 4
  • J. Bürger
    • 4
  • K. Derikum
    • 4
  • C. Grupen
    • 4
  • H. Meyer
    • 2
  • M. Rössler
    • 2
  • K. Wacker
    • 5
  1. 1.I. Physikalisches Institut der RWTH AachenAachenFederal Republic of Germany
  2. 2.Deutsches Elektronen-Synchrotron DESY, HamburgHamburgFederal Republic of Germany
  3. 3.II. Institut für Experimentalphysik der Universität HamburgHamburgFederal Republic of Germany
  4. 4.Gesamthochschule SiegenSiegenFederal Republic of Germany
  5. 5.Gesamthochschule WuppertalWuppertalFederal Republic of Germany

Personalised recommendations