Il Nuovo Cimento (1955-1965)

, Volume 33, Issue 1, pp 25–39 | Cite as

The study of (Σ-π) resonance at 1405 MeV in emulsions

  • A. Z. M. Ismail
  • S. Lokanathan
  • Y. Prakash
Article
First Online:
Received:

Summary

The resultant momenta of 154 (Σ-π) pairs produced by K− captures in emulsion nuclei have been studied. No evidence for the existence of a sharp (Σ-π) resonance has been observed. The results seem to be in general agreement with the calculations of Adair for the distribution of the resultant (Σ-π) momentum expected from nuclear effects without any resonant interaction. The distribution of the total visible energy of the outgoing particles (T∑+Tπ+Trecoil) suggests that several states of the recoil are formed from K− captures in light emulsion nuclei.

Riassunto

Si sono studiati gli impulsi risultanti di 154 coppie (Σ-π) prodotte da catture di K− nei nuclei dell’emulsione. Non si sono osservate prove dell’esistenza di una netta risonanza (Σ-π). I risultati sembrano in generale accordo con i calcoli di Adair della distribuzione del momento (Σ-π) risultante previsto in base agli effetti nucleari senza interazioni risonanti. La distribuzione dell’energia visibile totale delle particelle uscenti (T∑+Tπ+Trinc) suggerisce che parecchi stati del rinculo sono formati da catture di K− nei nuclei leggeri dell’emulsione.

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

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. (1).
    M. Alston, L. W. Alvarez, P. Eberhard, M. Good, W. Graziano, H. Ticho andS. Wojcicki:Phys. Rev. Lett.,6, 698 (1961).CrossRefADSGoogle Scholar
  2. (2).
    G. Alexander, G. R. Kalbfleisch, D. H. Miller andG. A. Smith:Phys. Rev. Lett.,8, 447 (1962).CrossRefADSGoogle Scholar
  3. (3).
    M. Alston, L. W. Alvarez, M. Ferro-Luzzi, A. H. Rosenfeld, H. K. Ticho andS. G. Wojcicki:Proc. Intern. Conf. High-Energy Physics, CERN (1962), p. 311.Google Scholar
  4. (4).
    Y. Eisenberg, G. Yekutieli, P. Abrahamsson andD. Kessler:Nuovo Cimento,21, 563 (1961);Y. Eisenberg andD. Kessler:Proc. Aix-en-Provence Conf. (1961), p. 383.CrossRefGoogle Scholar
  5. (**).
    A brief summary of this work along with the results of a similar experiment by University College, London-Brussels group was presented at the Sienna Conference on Elementary Particles (1963).Google Scholar
  6. (5).
    E. H. S. Burhop:Proc. Aix-en-Provence Conf., (1961), p. 395.Google Scholar
  7. (6).
    Å. Frisk andA. G. Ekspong:Phys. Lett.,3, 27 (1962);Å. Frisk:Ark. f. Fys.,24, 221 (1963).CrossRefADSGoogle Scholar
  8. (7).
    A. Barbaro-Galtieri, F. M. Smith andJ. W. Patrick:Phys. Lett.,5, 63 (1963).CrossRefADSGoogle Scholar
  9. (8).
    A. Samman, J. P. Gerrer andH. Braun:Phys. Lett.,6, 200 (1963).CrossRefADSGoogle Scholar
  10. (9).
    R. K. Adair:Phys. Lett.,6, 86 (1963).CrossRefADSGoogle Scholar
  11. (10).
    K −-collaboration:Nuovo Cimento,13, 690 (1959);14, 315 (1959).CrossRefGoogle Scholar
  12. (*).
    30 such events were found in this experiment and this is in good agreement with the frequency obtained in other experiments (6,10) where such events were found by line scanning.Google Scholar
  13. (11).
    H. H. Heckman, B. L. Perkins, W. G. Simon, F. M. Smith andW. H. Barkas:Phys. Rev.,107, 544 (1960).CrossRefADSGoogle Scholar

Copyright information

© Società Italiana di Fisica 1964

Authors and Affiliations

  • A. Z. M. Ismail
    • 1
  • S. Lokanathan
    • 1
  • Y. Prakash
    • 1
  1. 1.Nuclear Physics LaboratoryUniversity of OxfordOxford

Personalised recommendations