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The production of heavy hyperfragments by K--meson captures at rest in emulsion nuclei

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Il Nuovo Cimento (1955-1965)

Summary

In this study of hyperfragment production by K--meson absorptions at rest in emulsion nuclei, an attempt has been made to estimate the contribution of heavy spallation hyperfragments to the total observed number. In a sample of 24 640 K--meson captures, 1612 secondary events have been attributed to the production and subsequent decay of hyperfragments. From a study of the characteristics of both the production and decay disintegrations, it is concluded that about one half of the observed hyperfragments consists of λ0-hyperons trapped in the heavy spallation products of silver and bromine and these are almost entirely confined to the (0/3) μm range interval. The consequences of their presence aie discussed.

Riassunto

In questo studio della produzione di iperframmenti nell’assorbimento di mesoni K-in quiete nei nuclei dell’emulsione, si fa un tentativo di valutare il contributo dei frammenti pesanti di demolizione al numero totale osservato. In un campione di 24 640 catture di mesoni K-, 1612 eventi secondari sono stati attribuiti alla produzione e successivo decadimento degli ipeiframmenti. Da uno studio delle caratteristiche delle disintegrazioni sia di produzione che di decadimento, si conclude che circa la metà degli iperframmenti osservati consiste di iperoni Λ0 catturati nei prodotti pesanti di demolizione dell’argento e del bromo ed essi sono quasi interamente conflnati nel-Pintervallo di percorso (0/3) μm. Si discutono le conseguenze della loro presenza.

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References

  1. J. P. Lagnaux, J. Lemonne, J. Sacton, L. Bishara, D. H. Davis andM. A. Hussain:Phys. Lett,4, 341 (1963).

    Article  ADS  Google Scholar 

  2. J. Lemonne, P. Renard, J. Sacton, J. E. Allen, L. Bishara, D. H. Davis andD. A. Garbutt:Bulletin de l’Institut de Physique de l’ Université de Bruxelles, n.10 (1963).

  3. B. D. Jones, B. Sanjeevaiah, J. Zakrzewski, M. Csejthey-Barth, J. P. Lagnaux, J. Sacton, M. J. Beniston, E. H. S. Burhop andD. H. Davis:Phys. Rev.,127, 236 (1962).

    Article  ADS  Google Scholar 

  4. E. R. Fletcher, J. Lemonne, P. Renard, J. Sacton, D. O’Sullivan, T. P. Shah, A. Thompson, P. Allen, Sr. M. Heeran, A. Montwill, J. E. Allen, M. J. Beniston, D. A. Garbutt, R. C. Kumar, P. V. March, T. Pniewski andJ. Zakrzewski:Phys. Lett.,3, 280 (1963).

    Article  ADS  Google Scholar 

  5. D. Abeledo, L. Choy, R. G. Ammar, N. Crayton, R. Levi-Setti, M. Raymund andO. Skjeggestad:Nuovo Cimento,22, 1171 (1961).

    Article  Google Scholar 

  6. D. H. Davis, M. Csejthey-Barth, J. Sacton, B. D. Jones, B. Sanjeevaiah andJ. Zakrzewski:Nuovo Cimento,22, 275 (1961).

    Article  Google Scholar 

  7. W. Knigiit, F. R. Stannard, F. Oppenheimer, B. Rickey andR. Wilson:Contribution to the International Conference on Hyper fragments (St. Cergue, 1963), to be published.

  8. D. H. Davis, R. Levi-Setti, M. Raymund, O. Skjeggestad, G. Tomasini, J. Lemonne, P. Renard andJ. Sacton:Phys. Rev. Lett.,9, 461 (1962).

    ADS  Google Scholar 

  9. M. Danysz andJ. Zakrzewski: private communication (1963).

  10. B. Aubert, N. Courant, H. Filthuth, A. Segar andW. Willis:Proc. of the 1962 Conference on Instrumentation for High-Energy Physics held at Cern inNucl. Instr. and Meth. 20, 51 (1963).

  11. M. C. Amerighi, F. Baldassare, M. J. Beniston, A. Bonetti, D. H. Davis, M. Di Corato, C. Dilworth, D. Ferreira, E. Frota-Pessoa, W. B. Lasich, N. Raina, M. René, J. Sacton andA. E. Sichirollo:Nuovo Cimento,12, 91 (1959).

    Article  Google Scholar 

  12. J. Sacton:Thesis, Université Libre de Bruxelles (1961).

  13. K-Collaboration - Part I:Nuovo Cimento,13, 690 (1959).

    Article  Google Scholar 

  14. See for example:M. Demeur.A. Huieux andG. Vanderhaeghe:Nuovo Cimento,4, 509 (1956).

    Article  Google Scholar 

  15. See for example:M. Csejthey-Barth andJ. Sacton:Bulletin de l’ Institut de Physique de l’ Université de Bruxelles, n.4 (1962).

  16. I. Dostrowsky, P. Rabinowitz andR. Bivins:Phys. Rev.,111, 1659 (1958).

    Article  ADS  Google Scholar 

  17. A. Z. M. Ismail, I. R. Kenyon, A. W. Key, S. Lokanathan andY. Prakash:Nuovo Cimento,29, 1019 (1963).

    Article  Google Scholar 

  18. J. Cuevas, J. Diaz, D. Harmses, W. Just, H. Kramer, H. Spitzer andM. W. Teucher:Contribution to the International Conference on Hyperfraqments (St. Cergue, 1963), to be published.

  19. E. R. Fletcher et al., to be published.

  20. M. W. Holland: preprint (1963).

  21. P. B. Jones:Phil. Mag.,3, 33 (1958).

    Article  ADS  Google Scholar 

  22. K Collaboration - Part II:Nuovo Cimento,14, 315 (1959).

    Article  Google Scholar 

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Lemonne, J., Mayeur, C., Sacton, J. et al. The production of heavy hyperfragments by K--meson captures at rest in emulsion nuclei. Nuovo Cim 34, 529–541 (1964). https://doi.org/10.1007/BF02749996

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  • DOI: https://doi.org/10.1007/BF02749996

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