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arXiv · 0804.1469

Near threshold ppbar enhancement in the J/psi -> omega ppbar decay

J. Haidenbauer·Ulf-G. Meißner·A. Sibirtsev
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Abstract

The near-threshold behavior of the ppbar invariant mass spectrum from the J/psi -> omega ppbar decay reported recently by the BES Collaboration is analyzed. Contrary to the statement made by the BES Collaboration itself our study demonstrates that there is indeed a noticeable enhancement in the ppbar invariant mass spectrum near threshold. Moreover, this enhancement is nicely reproduced by the final state interaction in the relevant 11S0 ppbar partial wave as given by the Julich nucleon--antinucleon model. Therefore, and again contrary to the statement by the BES Collaboration, their new data on J/psi -> omega ppbar decay in fact strongly support the FSI interpretation of the ppbar enhancement, seen also in other decay reactions.

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J. Haidenbauer, Ulf-G. Meißner, A. Sibirtsev. 2008-04-09. Near threshold ppbar enhancement in the J/psi -> omega ppbar decay. https://doi.org/10.1016/j.physletb.2008.07.080

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