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

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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.

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Correspondence to J. Haidenbauer.

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Sibirtsev, A., Haidenbauer, J., Hammer, H.W. et al. The pp→K+ Σ +n cross-section from missing-mass spectra. Eur. Phys. J. A 32, 229–241 (2007). https://doi.org/10.1140/epja/i2007-10370-1

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  • DOI: https://doi.org/10.1140/epja/i2007-10370-1

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