The pp -&gt; K+Sigma(+)n cross-section from missing-mass spectra

Sibirtsev, A.; Haidenbauer, J.; Meissner, U.G.; Hammer, H.-W.

doi:10.1140/epja/i2007-10370-1

Journal Article

PreJuSER-59363

The pp -> K+Sigma(+)n cross-section from missing-mass spectra

Sibirtsev, A.FZJ* ; Haidenbauer, J. ; Hammer, H.-W.FZJ* ; Meissner, U. G.FZJ*

2007
Springer Berlin

The European physical journal / A 32, 229 - 241 (2007) [10.1140/epja/i2007-10370-1]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10532 doi:10.1140/epja/i2007-10370-1

Abstract: We utilize existing inclusive data on K+-meson momentum spectra of the reaction pp -> K+X at T-p = 2.3-2.85 GeV to deduce total cross-sections for pp -> K(+)Z(+)n. The method used to extract those 'cross-sections is explained and discussed in detail. Our result for T-p = 2.85 GeV is consistent with the data point from a direct measurement at the same beam energy. The cross-section obtained for T-p = 2.3 GeV is with 13.7 +/- 2.3pb considerably smaller than the value found in a recent experiment by the COSY-11 Collaboration at a somewhat lower beam energy, indicating that the pp -> K+Sigma(+)n, reaction cross-section could exhibit a rather unusual energy dependence.

Keyword(s): p p: inclusive reaction ; p p: exclusive reaction ; K+: hadroproduction ; Sigma+: associated production ; channel cross section: energy dependence ; K+: momentum spectrum ; mass spectrum: missing-mass ; angular dependence ; data analysis method ; p Lambda: final-state interaction ; numerical calculations: interpretation of experiments ; p p --> K+ anything ; p p --> Sigma+ n anything ; 2.30-2.85 GeV-kin