Near threshold pp¯ enhancement in B and J/Ψ decay

The near-threshold enhancement in the pp¯ invariant mass spectrum from the B⁺→K⁺pp¯ decay reported recently by the BABAR Collaboration is studied within the Jülich NN¯ model. We illustrate that the invariant mass dependence of the pp¯ spectrum close to the threshold can be reproduced by the final state interactions. This explanation is in line with our previous analysis of the pp¯ invariant mass spectrum from the J/Ψ→γpp¯ decay measured by the BES Collaboration. We also comment on a structure found recently in the π⁺π^-η^' mass spectrum of the radiative J/Ψ decay by the BES Collaboration. In particular we argue that one should be rather cautious in bringing this structure in connection with the enhancement found in the pp¯ invariant mass spectrum or with the existence of NN¯ bound states.