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Etude à 1.15 GeV/c de la création associée π+ + p → Σ+ + K+

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Il Nuovo Cimento (1955-1965)

Summary

78 associated production events Σ-+ p → Σ++ K+ have been investigated by means of a propane bubble chamber (40 cm x x 20 cm x 20 cm) placed in a magnetic field of 12.7 kG. The beam used had a momentum of (1.155±0.025) GeV/e, and had the following composition: π+:pπ+:e+. We have obtained following results: 1) The total (Σ (0.214±0.035) mb) and differential cross sections obtained are in agreement with the charge independence hypothesis; 2) for Σ+(π+n) events, no significant asymmetries, up-down, right-left or forward-backward, were found; 3) the mean life of Σ+ is τ=(0.75 +0.13−0.09 )⋅10−10s.

Riassunto

Abbiamo analizzato 78 eventi di produzione associata π+ + p→ Σ+ + K+, per mezzo di una camera a bolle a propano (40 cm x 20 cm x 20 cm) posta in un campo magnetico di 12.7 kG. H fascio usato aveva un impulso di (1.155±0.025) GeV/c ed aveva la seguente composizione: π+ ;P :Μ+ :e+ -100: 10;8 : 1. Abbiamo ottenuto i seguenti risultati: 1) le sezioni d’urto totale(Σ (0.214±0.035) mb) e differenziale ottenute si accordano con l’ipotesi della indipendenza della carica; 2) per gli eventiΣ+(π+n) non ho trovato significative asimmetrie sopra-sotto, destra-sinistra od avanti-indietro; 3) la vita media del τ=(0.75 +0.13−0.09 )⋅10−10s

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Authors and Affiliations

  1. Laboratoire de Physique Corpusculaire à Haute Energie, Centre d’ Etudes Nucléaires, Saclay

    A. Berthelot, A. Daudin, O. Goussu, F. Grard, M. A. Jabiol, F. Lévy, C. Lewin & A. Rogozinski

  2. Faculté des Sciences, Laboratoire de Physique Nucléaire, Orsay

    J. Laberrigue-Frolow, C. Ouannés & L. Vigneron

Authors
  1. A. Berthelot
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  2. A. Daudin
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  3. O. Goussu
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  4. F. Grard
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  5. M. A. Jabiol
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  6. F. Lévy
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  7. C. Lewin
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  8. A. Rogozinski
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  9. J. Laberrigue-Frolow
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  10. C. Ouannés
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  11. L. Vigneron
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Additional information

Les résultats préliminaires de cette étude ont fait l’objet d’une communication à la Xe Conférence des Hautes Energies (Rochester, Août 1960).

Détaché de l’Institut inter-universitaire des Sciences Nucléaires, Bruxelles.

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Berthelot, A., Daudin, A., Goussu, O. et al. Etude à 1.15 GeV/c de la création associée π+ + p → Σ+ + K+ . Nuovo Cim 21, 693–709 (1961). https://doi.org/10.1007/BF02785596

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  • DOI: https://doi.org/10.1007/BF02785596

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