Skip to main content
SpringerLink
Log in

First measurement of the Λ→nγ branching ratio

  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

In an experiment performed at the CERN-SPS charged hyperon beam, we have observed the radiative decay Λ→nγ, using well identified Λ from the decays of Ο− of 116 GeV/c momentum. Neutrons and photons from the Λ decays were observed in liquid argon and lead glass detectors. From a sample of 31 candidates, containing an estimated background of 7.3 events, the decay branching ratio was measured to be Γ(Λ→nγ)/Γ(Λ→all)=(1.02±0.33)×10−3.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. S.F. Biagi et al.: Z. Phys. C—Particles and Fields28, 495 (1985)

    Google Scholar 

  2. P. Jacot-Guillarmod: PhD Thesis, University of Lausanne (1984). Unpublished

  3. M. Bourquin et al.: Phys. Lett.B153, 13 (1979)

    Google Scholar 

  4. P. Mühlemann: UGVA-DPNC 1983/03-111 University of Geneva. Unpublished

  5. Particle Data Group: Rev. Mod. Phys.56, No. 2. Part 2 (1984)

  6. F.J. Gilman, A.B. Wise: Phys. Rev.D19, 976 (1979)

    Google Scholar 

  7. A.N. Kamal, R.C. Verma: Phys. Rev.D26, 190 (1982)

    Google Scholar 

  8. P. Eckert, B. Morel: UGVA 103-340 (1982) University of Geneva. Unpublished

  9. G. Farrar: Phys. Rev.D4, 212 (1971)

    Google Scholar 

  10. M.B. Gavela et al.: Phys. Lett.101 B, 417 (1981)

    Google Scholar 

  11. K.G. Rauh: Z. Phys. C—Particles and Fields10, 81 (1981)

    Google Scholar 

  12. M. Scadron, L. Thebaud: Phys. Rev.D8, 2190 (1973)

    Google Scholar 

  13. M. Scadron, M. Visnescu: Phys. Rev.D28, 1117 (1983)

    Google Scholar 

  14. V.I. Zakharov, A.B. Kaidolov: Sov. J. Nucl. Phys.5, 259 (1967)

    Google Scholar 

Download references

Author information

Author notes

  1. H. J. Burckhart

    Present address: CERN, CH-1211, Geneva 23, Switzerland

  2. S. F. Biagi

    Present address: University of Liverpool, UK

  3. W. C. Louis

    Present address: Princeton University, NJ, USA

  4. Th. Modis

    Present address: Digital Equipment Corporation, Geneva, Switzerland

  5. P. Mühlemann

    Present address: Zellweger-Uster, Hombrechtikon, Switzerland

  6. P. Schirato

    Present address: Hôptial cantonal, Geneva, Switzerland

  7. K. -P. Streit

    Present address: Physikalisches Institut, Universität Heidelberg, FRG

  8. C. Yanagisawa

    Present address: State University of New York at Stony Brook, NY, USA

Authors and Affiliations

  1. H.H. Wills Physics Laboratory, University of Bristol, BS8 1TL, Bristol, UK

    W. M. Gibson, R. C. Owen, V. J. Smith & A. T. Wood

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

    K. -P. Streit

  3. University of Geneva, CH-1211, Geneva 4, Switzerland

    M. Bourquin, P. Extermann, Th. Modis, P. Mühlemann, J. Perrier, K. J. S. Ragan & P. Schirato

  4. Physikalisches Institut, Universität Heidelberg, Federal Republic of Germany

    H. J. Burckhart & H. W. Siebert

  5. University of Lausanne, CH-1015, Lausanne, Switzerland

    Ch. Doré, M. Gailloud, P. Jacot-Guillarmod, Ph. Rosselet & R. Weill

  6. Queen Mary College, University of London, E1 4NS, London, UK

    S. F. Biagi

  7. Rutherford Appleton Laboratory, OX11 0QX, Chilton, Oxon, UK

    R. M. Brown, C. N. P. Gee, R. J. Gray, P. W. Jeffreys, W. C. Louis, B. J. Saunders, J. J. Thresher & C. Yanagisawa

Authors
  1. S. F. Biagi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. Bourquin
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. R. M. Brown
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. H. J. Burckhart
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Ch. Doré
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. P. Extermann
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. M. Gailloud
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. C. N. P. Gee
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. W. M. Gibson
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. R. J. Gray
    View author publications

    You can also search for this author in PubMed Google Scholar

  11. P. Jacot-Guillarmod
    View author publications

    You can also search for this author in PubMed Google Scholar

  12. P. W. Jeffreys
    View author publications

    You can also search for this author in PubMed Google Scholar

  13. W. C. Louis
    View author publications

    You can also search for this author in PubMed Google Scholar

  14. Th. Modis
    View author publications

    You can also search for this author in PubMed Google Scholar

  15. P. Mühlemann
    View author publications

    You can also search for this author in PubMed Google Scholar

  16. R. C. Owen
    View author publications

    You can also search for this author in PubMed Google Scholar

  17. J. Perrier
    View author publications

    You can also search for this author in PubMed Google Scholar

  18. K. J. S. Ragan
    View author publications

    You can also search for this author in PubMed Google Scholar

  19. Ph. Rosselet
    View author publications

    You can also search for this author in PubMed Google Scholar

  20. B. J. Saunders
    View author publications

    You can also search for this author in PubMed Google Scholar

  21. P. Schirato
    View author publications

    You can also search for this author in PubMed Google Scholar

  22. H. W. Siebert
    View author publications

    You can also search for this author in PubMed Google Scholar

  23. V. J. Smith
    View author publications

    You can also search for this author in PubMed Google Scholar

  24. K. -P. Streit
    View author publications

    You can also search for this author in PubMed Google Scholar

  25. J. J. Thresher
    View author publications

    You can also search for this author in PubMed Google Scholar

  26. R. Weill
    View author publications

    You can also search for this author in PubMed Google Scholar

  27. A. T. Wood
    View author publications

    You can also search for this author in PubMed Google Scholar

  28. C. Yanagisawa
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Work supported in part by the UK Science and Engineering Research Council, the Swiss National Foundation for Scientific Research and the Bundesministerium für Forschung und Technologie, Federal Republic of Germany

Rights and permissions

Reprints and permissions

About this article

Cite this article

Biagi, S.F., Bourquin, M., Brown, R.M. et al. First measurement of the Λ→nγ branching ratio. Z. Phys. C - Particles and Fields 30, 201–211 (1986). https://doi.org/10.1007/BF01575427

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01575427

Keywords

Search

Navigation