Elsevier

Nuclear Physics A

Volume 558, 7 June 1993, Pages 361-367
Nuclear Physics A

Observation of subthreshold double strangeness production in p annihilations on Xe nuclei; search for stable H dibaryon

Presented by A.G. Dolgolenkoa
https://doi.org/10.1016/0375-9474(93)90405-MGet rights and content

Abstract

The double strangeness production has been observed in two final states of annihilation of antiprotons at momentum less than 0.9 GeV/c on Xe nuclei: K+K+X (8 events) and K+K0ΛX (6 events). The probabilities of the reaction pXe → K+K+X vary from 2 · 10−5 (at rest) up to 7 · 10−5 (in flight). The reaction pXe → K+K0ΛX is observed only in flight with probability 3 · 10−4. The properties of the observed reactions are similar to those resulting from the cascade process with production of Ξ hyperon: pN → K−K, K → Kπ, −KN → ΞK, ΞN → ΛΛ. The new upper limit on the production probability of the stable H(S = −2) dibaryon in the reaction Xe → K+K+H(H → Σ p)X was obtained to be < 2 · 10 (90%C.L.).

References (12)

  • J. Rafelski

    Phys. Lett.

    (1988)
  • C. Dover

    Preprint BNL-43587

    (1989)
  • J. Cugnon et al.

    Z. Phys.

    (1991)
  • J.Vandermeulen, Inst. Phys. Conf., Ser.F, No. 124, Physics of SuperLEAR,...
  • V.B. Kopeliovich

    NAN-91

  • K. Kilian

    Physics at LEAR with Low Energy Antiprotons

There are more references available in the full text version of this article.

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