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

A. Sibirtsev·J. Haidenbauer·H. -W. Hammer·Ulf-G. Meißner
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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^+Σ^+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\pm2.3 μb 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^+Σ^+n reaction cross section could exhibit a rather unusual energy dependence.

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A. Sibirtsev, J. Haidenbauer, H. -W. Hammer, Ulf-G. Meißner. 2007-01-31. The pp -> K^+Sigma^+n cross section from missing mass spectra. https://doi.org/10.1140/epja%2Fi2007-10370-1

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