Il Nuovo Cimento (1955-1965)

, Volume 27, Issue 6, pp 1405–1409 | Cite as

Mean life-time of the neutral pion

  • E. L. Koller
  • S. Taylor
  • T. Huetter


The mean life-time of the π0- is measured by the method of Harris, Orear and Taylor. The decay distance of π0-produced by Kπ2-decay at rest (K+→π+0) and subsequent decay by the Dalitz mode (π0→e++e+γ) is measured. Using Ilford G-5 emulsions, exposed in the 300 MeV/c separated K+ beam from the Bevatron at Berkeley, 88 of the above events were found. The observed mean π0 life-time is (2.8±0.9)·10−16) s.


Si misura col metodo di Harris, Orear e Taylor la vita media del mesone π0, e la distanza di decadimento del mesone π0 prodotto nel decadimento Kπ2 in quiete (K+→π+0) e del susseguente decadimento nel modo di Dalitz (π0→e++e+γ). Servendosi di emulsioni Ilford G-5, esposte al fascio separato di K+ di 300 MeV/c, si sono trovati 88 eventi del tipo suddetto. La vita media osservata del π0 è (2.8±0.9)·10−16) s.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. (1).
    G. Harris, J. Orear andS. Taylor:Phys. Rev.,106, 327 (1957).ADSCrossRefGoogle Scholar
  2. (2).
    R. F. Blackie, A. Engler andJ. H. Mulvey:Phys. Rev. Lett.,5, 384 (1960).ADSCrossRefGoogle Scholar
  3. (3).
    R. G. Glasser, N. Seeman andB. Stiller:Phys. Rev.,123, 1014 (1961).ADSCrossRefGoogle Scholar
  4. (4).
    H. Shwe, F. M. Smith andW. H. Barkas:Phys. Rev.,125, 1024 (1962).ADSCrossRefGoogle Scholar
  5. (5).
    J. Tietge andW. Püschel:Phys. Rev.,127, 1324 (1962).ADSCrossRefGoogle Scholar
  6. (6).
    G. Goldhaber et al.: Lawrence Radiation Laboratory Report BEV-483 (1960), unpublished.Google Scholar
  7. (8).
    S. K. Bose:Nuovo Cimento,23, 408 (1962).CrossRefMATHGoogle Scholar

Copyright information

© Società Italiana di Fisica 1963

Authors and Affiliations

  • E. L. Koller
    • 1
  • S. Taylor
    • 1
  • T. Huetter
    • 1
  1. 1.Department of PhysicsStevens Institute of TechnologyHoboken

Personalised recommendations