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Inclusive K^+ meson production in proton-nucleus interactions

M. Büscher·V. Koptev·M. Nekipelov·Z. Rudy·H. Ströher·Yu. Valdau·S. Barsov·M. Hartmann·V. Hejny·V. Kleber·N. Lang·I. Lehmann·S. Mikirtychiants·H. Ohm
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Abstract

The production of K^+ mesons in pA (A = D, C, Cu, Ag, Au) collisions has been investigated at the COoler SYnchrotron COSY-Jülich 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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M. Büscher, V. Koptev, M. Nekipelov, Z. Rudy, H. Ströher, Yu. Valdau, S. Barsov, M. Hartmann, V. Hejny, V. Kleber, N. Lang, I. Lehmann, S. Mikirtychiants, H. Ohm. 2004-06-02. Inclusive K^+ meson production in proton-nucleus interactions. https://doi.org/10.1140/epja%2Fi2004-10036-6

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