Total Cross Section of the Reaction pp->pK+Lambda Close to Threshold


The energy dependence of the total cross section for the pp->pK+Lambda reaction was measured in the threshold region covering the excess energy range up to 7 MeV. Existing model calculations describe the slope of the measured cross sections well, but are too low by a factor of two to three in rate. The data were used for a precise determination of the beam momentum of the COSY-synchrotron.

Preprint: FZJ-IKP(I)-1997-1 in PostScript format (265kB)
Publication: Phys.Lett. B 420 (1998) 211-216