Étude des mésons K chargés, au moyen de deux chambres de Wilson superposées View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1954-03

AUTHORS

B. Gregory, A. Lagarrigue, L. Leprince-Ringuet, F. Muller, Ch. Peyrou

ABSTRACT

In this paper we present some results on charged heavy mesons. They were obtained with an experimental arrangement consisting essentially of two large cloud-chambers placed one above the other. The top chamber had a magnetic field while the bottom chamber was of the multiplate type. The contents of the different sections of the paper can be summarized as follows: 1. The double cloud-chamber method is compared with other more conventional methods. 2. The apparatus is briefly described. 3. The behaviour in the multiplate chamber of the charged secondaries of V±-decays occurring in the top chamber is disscussed. π-mesons have been identified through their nuclear interactions. The presence of μ-mesons is also strongly suggested by:a) the long mean free path of the secondaries andb) one direct mass measurement. 4. S and slow V±-events observed in the multiplate chamber are discussed. It is shown that one should distinguish between two groups of decays: One with secondaries of range smaller than 20 g cm−2 of Pb, the other with larger range secondaries. Although the first group can be due to τ-mesons, the second group cannot be so explained, at least not phenomenologically. 5. The results of mass measurements—from range and momentum—on the primaries of the second group of events are presented. The measurements agree with a unique value of (914±20) me; which appears to be different from the τ-mass. 6. We show that some, and probably most, of the secondaries of this second group of events are μ-mesons. This conclusion is based on the dynamics of the decay and results from the measured mass of the primary particle and the observed ranges of the secondaries. The observation of one large angle scattering indicates, however, that τ-mesons may also be present among the secondaries. More... »

PAGES

292-309

References to SciGraph publications

  • 1947-12. Evidence for the Existence of New Unstable Elementary Particles in NATURE
  • 1953-07. Contributions to the Τ-meson investigation in IL NUOVO CIMENTO (1943-1954)
  • 1949-01-15. Observations with Electron-Sensitive Plates Exposed to Cosmic Radiation* in NATURE
  • 1952-07. S-Particles in IL NUOVO CIMENTO (1943-1954)
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf02781396

    DOI

    http://dx.doi.org/10.1007/bf02781396

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1039849554


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