Inclusive K^+ meson production in proton-nucleus interactions

Details Inclusive K^+ meson production in proton-nucleus interactions Inclusive K^+ meson production in proton-nucleus interactions

2004-01-25

arxiv.org/abs/nucl-ex/0401031v2

Eur.Phys.J. A22 (2004) 301-317

Physics

Nuclear Physics

Nuclear Experiment

Accepted for publication in EPJ A; 17 pages, 10 figures, 11 tables

Scientific paper

10.1140/epja/i2004-10036-6

The production of K^+ mesons in pA (A = D, C, Cu, Ag, Au) collisions has been investigated at the COoler SYnchrotron COSY-J\"ulich for beam energies T_p = 1.0 - 2.3 GeV. Double differential inclusive pC cross sections at forward angles theta < 12 degrees as well as the target-mass dependence of the K^+ momentum spectra have been measured with the ANKE spectrometer. Far below the free NN threshold at T_{NN}=1.58 GeV the spectra reveal a high degree of collectivity in the target nucleus. From the target-mass dependence of the cross sections at higher energies, the repulsive in-medium potential of K^+ mesons can be deduced. Using pN cross-section parameterisations from literature and our measured pD data we derive a cross-section ratio of sigma(pn -> K^+ X) / sigma(pp -> K^+ X) ~ (3-4).

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