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We investigate the nature of the near-threshold enhancement in the ppbarinvariant mass spectrum of the reaction J/Psi -> gamma ppbar reported recentlyby the BES Collaboration. Using the Juelich NNbar model we show that the massdependence of the ppbar spectrum close to the threshold can be reproduced bythe S-wave ppbar final state interaction in the isospin I=1 state within theWatson-Migdal approach. However, because of our poor knowledge of the NNbarinteraction near threshold and of the J/Psi -> gamma ppbar reaction mechanismand in view of the controversal situation in the decay J/Psi -> pi0 ppbar,where no obvious signs of a ppbar final state interaction are seen,explanations other than final state interactions cannot be ruled out at thepresent stage.Comment: 9 pages, 7 figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

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