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Il Nuovo Cimento A (1971-1996)

, Volume 50, Issue 3, pp 393–421 | Cite as

Further study of the E-meson in antiproton-proton annihilations at rest

  • P. Baillon
  • D. Edwards
  • B. Maréchal
  • L. Montanet
  • M. Tomas
  • C. D'Andlau
  • A. Astier
  • J. Cohen-Ganouna
  • M. Della-Negra
  • S. Wojcicki
  • M. Baubillier
  • J. Duboc
  • F. James
  • F. Lévy
Article

Summary

In the study of the annihilation\(\bar pp \to K\bar K\pi \pi \pi \) at rest, we observed an important enhancement in the\(\left( {K\bar K\pi } \right)\) neutral system. We show that this enhancement is the manifestation of a resonance, which we call the E0 meson, with quantum numbersM=(1425±7) MeV, Γ=(80±10) MeV,IGJP=0+0 and branching ratio\(E \to K*\bar K\left( {\bar K*K} \right)/E \to \left( {K\bar K} \right)\pi - 1\).

Riassunto

Nello studio dell'annichilazione\(\bar pp \to K\bar K\pi \pi \pi \) in quiete, si è osservato un importante incremento nel sistema\(\left( {K\bar K\pi } \right)\) neutro. Si mostra che questo incremento è la manifestazione di una risonanza che si è chiamata mesone E0, con i numeri quanticiM=(1425±7) MeV, Γ=(80±10) MeV,IGJP=0+0 e un rapporto di decadimento\(E \to K*\bar K\left( {\bar K*K} \right)/E \to \left( {K\bar K} \right)\pi - 1\).

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Copyright information

© Società Italiana di Fisica 1967

Authors and Affiliations

  • P. Baillon
    • 1
  • D. Edwards
    • 1
  • B. Maréchal
    • 1
  • L. Montanet
    • 1
  • M. Tomas
    • 1
  • C. D'Andlau
    • 2
  • A. Astier
    • 2
  • J. Cohen-Ganouna
    • 2
  • M. Della-Negra
    • 2
  • S. Wojcicki
    • 2
  • M. Baubillier
    • 3
  • J. Duboc
    • 3
  • F. James
    • 3
  • F. Lévy
    • 3
  1. 1.CERNGeneva
  2. 2.Laboratoire de Physique NucléaireCollège de FranceParis
  3. 3.Institut de Physique NucléaireParis

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