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| Journal Article | PreJuSER-43424 |
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2004
Springer
Berlin
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Please use a persistent id in citations: http://hdl.handle.net/2128/10680 doi:10.1140/epja/i2003-10236-6
Abstract: The production of the Lambda- and Sigma(0)-hyperous has been measured via the pp --> pK(+)Lambda/Sigma(0) reaction at the internal COSY-11 facility in the excess energy range between 14 and 60 MeV. The transition of the Lambda/Sigma(o) cross-section ratio from about 28 at Q less than or equal to 13 MeV to the high-energy level of about 2.5 is covered by the data showing a strong decrease of the ratio between 10 and 20 MeV excess energy. Effects from the final-state interactions in the p-Sigma(o) channel seem to be much smaller than in the p-A channel. Estimates of the effective range parameters are given for the NLambda and the NSigma systems.
Keyword(s): p p: inelastic scattering ; Lambda: hadroproduction ; Sigma0: hadroproduction ; K+: associated production ; channel cross section: ratio ; energy dependence ; mass spectrum: missing-mass ; p hyperon: final-state interaction ; approximation: effective range ; magnetic spectrometer: experimental results ; Juelich COSY PS ; p p --> hyperon p K+
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