Il Nuovo Cimento (1955-1965)

, Volume 15, Issue 4, pp 652–657 | Cite as

Simple models for associated production in proton-proton collisions

  • E. Ferrari


The process p+p→Λ0+K++p is investigated by means of two simple models in which only the contribution of poles due to the exchange of an intermediate π0-meson or K+-meson respectively is taken into account. The total cross section is then calculated in terms of the total cross-sections for simpler processes. Numerical values are given for an energy of 3 GeV of the incident proton in the l.s.


Il processo p+p→Λ0+K++p è studiato per mezzo di due semplici modelli in cui si tiene conto soltanto del contributo dei poli associati allo scambio di un mesone π0 o K+ rispettivamente. È calcolata quindi la sezione d’urto totale, che risulta legata alla sezione d’urto totale per processi più semplici. Si danno valori numerici per una energia di 3 GeV nel s.l. del protone incidente.


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  1. (1).
    SeeP. Baumel, G. Harris, J. Orear andS. Taylor:Phys. Rev.,108, 1322, (1957);D. Berley andG. B. Collins:Phys. Rev.,112, 614 (1958);J. Hornbostel, E. O. Salant andG. T. Zorn:Phys. Rev.,112, 1311 (1958). These papers contain reference to earlier work.ADSCrossRefGoogle Scholar
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    Berley andCollins’ value is σtot=(0.04±0.06) mb (including also Σ0 and Σ+ production);Baumel and coll. have measured the differential cross-section at a certain energy and angle of the final K+, and derived the total cross-section by multiplying by statistical factors (assuming a constant interaction matrix element). They get σtot=0.21 mb.Google Scholar
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    E. Ferrari:Nuovo Cimento,13, 1285 (1959).CrossRefGoogle Scholar
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    G. F. Chew andF. E. Low:Phys. Rev.,113, 1640 (1959).ADSCrossRefMATHGoogle Scholar
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    O. R. Price, D. H. Stork andH. K. Ticho:Phys. Rev. Lett.,1, 212 (1958). See also theKiev Conf. Report on the Interaction of Strange Particles byL. W. Alvarez.ADSCrossRefGoogle Scholar
  6. (7).
    See theReports of the International Conference on High Energy Physics at CERN (1958), p. 323.Google Scholar
  7. (9).
    See the above-mentioned Report, p. 148.Google Scholar

Copyright information

© Società Italiana di Fisica 1960

Authors and Affiliations

  • E. Ferrari
    • 1
    • 2
  1. 1.Istituto di Fisica dell’UniversitàRoma
  2. 2.Istituto Nazionale di Fisica NucleareSezione di RomaItaly

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