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The European Physical Journal A

, Volume 32, Issue 2, pp 229–241 | Cite as

The pp→K+ Σ +n cross-section from missing-mass spectra

  • A. Sibirtsev
  • J. HaidenbauerEmail author
  • H. -W. Hammer
  • U. -G. Meißner
Regular Article - Hadron Physics

Abstract.

We utilize existing inclusive data on K+-meson momentum spectra of the reaction ppK + X at T p = 2.3-2.85GeV to deduce total cross-sections for ppK + Σ + n. The method used to extract those cross-sections is explained and discussed in detail. Our result for T p = 2.85GeV is consistent with the data point from a direct measurement at the same beam energy. The cross-section obtained for T p = 2.3GeV is with 13.7±2.3μb considerably smaller than the value found in a recent experiment by the COSY-11 Collaboration at a somewhat lower beam energy, indicating that the ppK + Σ + n reaction cross-section could exhibit a rather unusual energy dependence.

PACS.

13.75.Ev Hyperon-nucleon interactions 13.75.Jz Kaon-baryon interactions 14.20.Gk Baryon resonances with S = 0 25.40.Ny Resonance reactions 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • A. Sibirtsev
    • 1
  • J. Haidenbauer
    • 2
    Email author
  • H. -W. Hammer
    • 1
  • U. -G. Meißner
    • 1
    • 2
  1. 1.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie)Universität BonnBonnGermany
  2. 2.Institut für KernphysikForschungszentrum JülichJülichGermany

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