Production of V 0 pairs in the hyperon experiment WA89

M.I. Adamovich,Yu.A. Alexandrov,S.P. Baranov, D. Barberis,M. Beck, C. Bérat,W. Beusch, M. Boss, S. Brons, W. Brückner,M. Buénerd,C. Busch, C. Büscher, F. Charignon, J. Chauvin, E.A. Chudakov,U. Dersch, F. Dropmann,J. Engelfried,F. Faller,A. Fournier,S.G. Gerassimov, M. Godbersen, P. Grafström,T. Haller, M. Heidrich,E. Hubbard, R.B. Hurst, K. Königsmann, I. Konorov, S. Kovalenko,N. Keller,K. Martens,P. Martin, S. Masciocchi,R. Michaels, U. Müller, H. Neeb,D. Newbold, C. Newsom,S. Paul, J. Pochodzalla, I. Potashnikova, B. Povh,Z. Ren, M. Rey-Campagnolle,G. Rosner,L. Rossi,H. Rudolph,C. Scheel,L. Schmitt, H.-W. Siebert,A. Simon,V. Smith,O. Thilmann, A. Trombini, E. Vesin, B. Volkemer, K. Vorwalter, T. Walcher, G. Wälder, R. Werding,E. Wittmann,M.V. Zavertyaev

EUROPEAN PHYSICAL JOURNAL C（2007）

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摘要

We present a comprehensive study of the inclusive production of V 0 V 0 pairs (V 0 =Λ, Λ̄ or K S ) by Σ - and π - of 340 GeV/ c momentum and neutrons of 260 GeV/ c mean momentum in copper and carbon targets. In particular, the dependence of the x F spectra on the combination of beam-particle and produced V 0 V 0 pair is investigated and compared to predictions obtained from PYTHIA and QSGM calculations. The data and these predictions differ in many details, the agreement can at best be termed as qualitative. A signal from decays of the tensor meson f’ 2 (1525) was observed in the K S K S mass distribution and inclusive production cross sections were measured. No signal was found from the double-strange H-dibaryon decaying to ΛΛ.

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关键词

Pair Production,Production Cross Section,Beam Particle,Inclusive Production,Carbon Target

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