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Subthreshold $K^+$ production in proton-nucleus collisions

Abstract : Double differential K$^+$ cross sections have been measured in p+C collisions at 1.2, 1.5 and 2.5 GeV beam energy and in p+Pb collisions at 1.2 and 1.5 GeV. The K$^+$ spectrum taken at 2.5 GeV can be reproduced quantitatively by a model calculation which takes into account first chance proton-nucleon collisions and internal momentum with energy distribution of nucleons according to the spectral function. At 1.2 and 1.5 GeV beam energy the K$^+$ data excess significantly the model predictions for first chance collisions. When taking secondary processes into account the results of the calculations are in much better agreement with the data.
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Contributor : Marie-Christine Blanchet <>
Submitted on : Tuesday, April 6, 1999 - 10:46:34 AM
Last modification on : Saturday, April 14, 2018 - 11:46:03 AM

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M. Debowski, R. Barth, M. Boivin, Y. Le Bornec, M. Cieslak, et al.. Subthreshold $K^+$ production in proton-nucleus collisions. Zeitschrift für Physik A, Springer-Verlag, 1996, 356, pp.313-325. ⟨10.1007/s002180050185⟩. ⟨in2p3-00001316⟩



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