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

Sibirtsev, A.; Haidenbauer, J.; Hammer, H. -W.; Meißner, Ulf-G.

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

Authors

Description

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.
12 pages, 8 figures