Advertisement

Il Nuovo Cimento A (1965-1970)

, Volume 54, Issue 3, pp 537–548 | Cite as

Lifetime of the ∑-hyperon

  • H. Whiteside
  • J. Gollub
Article

Summary

A new measurement of the ∑ mean lifetime has been obtained from a sample of 506 ∑ decays and reactions which are produced in a hydrogen bubble chamber and satisfy certain geometrical criteria. By using a maximum-likelihood calculation and making an appropriate correction for ∑ interactions in flight, the value obtained for the ∑ lifetime is (1.38±0.07)·10−10 s.

Keywords

Alcuni Production Angle Ambiguous Event Bubble Chamber Scanning Table 
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.

Время жизин ∑-гиперона

Резюме

Было проведено новое измерение сремени жизни ∑ из образца, содержащего 506 ∑ распадов и реакции, которые производились в водородной пузырьковой камере и удовлетворяют определенным геометрическим критериям. Посредством использования вычисления максимаьной вероятности и учитывая соответствующую поправку для ∑ взаимодействий в полете, величина, полученная для времени жизни ∑ равна (1.38±0.07)·10−10 сек.

Riassunto

Si è ottenuta una nuova misura del tempo di vita medio del ∑ utilizzando 506 reazioni e decadimenti di ∑ prodotti in una camera a bolle ad idrogeno e soddisfacenti alcuni criteri geometrici. Usando un calcolo di massima probabilità e introducendo adeguate correzioni per interazioni in volo ∑, si ha che la vita media di ∑ è di (1.38±0.07)·10−10 s.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. (1).
    A. H. Rosenfeld, A. Barbaro-Galtieri, W. H. Barkas, P. L. Bastien, J. Kirz andM. Roos:Rev. Mod. Phys.,37, 633 (1965).ADSMathSciNetCrossRefGoogle Scholar
  2. (2).
    W. E. Humphrey andR. R. Ross:Phys. Rev.,127, 1316 (1962).ADSCrossRefGoogle Scholar
  3. (3).
    C. Y. Chang:Phys. Rev.,151, 1081 (1966).ADSCrossRefGoogle Scholar
  4. (4).
    B. Aubert, H. Courant, H. Filthuth, A. Segar andW. Willis:Nucl. Instr. and Meth.,20, 51 (1963).ADSCrossRefGoogle Scholar
  5. (5).
    P. Baillon:Thesis, University of Paris 1963 (unpublished).Google Scholar
  6. (6).
    A. H. Rosenfeld, A. Barbaro-Galtieri, W. H. Barkas, P. L. Bastien, J. Kirz andM. Roos:Rev. Mod. Phys.,37, 635 (1965).ADSMathSciNetCrossRefGoogle Scholar
  7. (7).
    A. H. Rosenfeld, A. Barbaro-Galtieri, W. H. Barkas, P. L. Bastien, J. Kirz andM. Roos:Rev. Mod. Phys.,37, 634 (1965).ADSMathSciNetCrossRefGoogle Scholar
  8. (8).
    R. A. Burnstein, T. B. Day, B. Kehoe, B. Sechi-Zorn andG. A. Snow:Phys. Rev. Lett.,13, 66 (1964).ADSCrossRefGoogle Scholar
  9. (9).
    M. S. Bartlett:Phil. Mag.,44, 257 (1953).Google Scholar
  10. (10).
    J. Orear:Notes on Statistics for Physicists, UCRL-8417, Berkeley, Cal. (1958).Google Scholar

Copyright information

© Società Italiana di Fisica 1968

Authors and Affiliations

  • H. Whiteside
    • 1
  • J. Gollub
    • 1
  1. 1.Physics DepartmentOberlin CollegeOberlin

Personalised recommendations