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Journal Articles Zeitschrift für Physik A Year : 1996

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


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.

Dates and versions

in2p3-00001316 , version 1 (06-04-1999)



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