Cross sections of the ppK+Σ+npp\to K^+\Sigma^+n reaction close to threshold

Collaboration
Nov, 2009
8 pages
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Abstract: (arXiv)
We have measured inclusive data on K+K^+-meson production in pppp collisions at COSY Juelich close to the hyperon production threshold and determined the hyperon-nucleon invariant mass spectra. The spectra were decomposed into three parts: Λp\Lambda p, Σ0p\Sigma^0p and Σ+n\Sigma^+n. The cross sections for the later channel were found to be much smaller than a previous measurement in that excess energy region. The data together with previous results at higher energies are compatible with a phase space dependence.
Note:
  • 3 figures
  • 13.75.Ev
  • 13.75.-n
  • Meson production
  • hyperon-nucleon interaction
  • p p: inclusive reaction
  • K+: hadroproduction
  • Sigma+: associated production
  • threshold
  • hyperon: associated production
  • channel cross section: energy dependence