The reaction p¯p→Λ¯c−Λc+ close to threshold

Predictions for the charm-production reaction p¯p→Λ¯c−Λc+ for energies near the threshold are presented. The calculations are performed in a meson-exchange framework in close analogy to our earlier study on p¯p→Λ¯Λ by connecting the two processes via SU(4)SU(4) symmetry. The obtained Λ¯c−Λc+ production cross sections are in the order of 1 to 7 μb, i.e. a factor of around 10–70 smaller than the corresponding cross sections for Λ¯Λ. However, they are 100 to 1000 times larger than predictions of other model calculations in the literature.