Antiproton-Proton Channels in J/psi Decays

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dc.creatorLoiseau, B.
dc.creatorWycech, S.
dc.date2005-01-13
dc.date2005-12-16
dc.date.accessioned2026-07-07T10:29:23Z
dc.date.available2026-07-07T10:29:23Z
dc.descriptionThe recent measurements by the BES Collaboration of J/psi decays into a photon and a proton-antiproton pair indicate a strong enhancement at the proton-antiproton threshold not observed in the decays into a neutral pion and a proton-antiproton pair. Is this enhancement due to a proton-antiproton quasi-bound state or a baryonium? A natural explanation follows from a traditional model of proton-antiproton interactions based on G-parity transformation. The observed proton-antiproton structure is due to a strong attraction in the 1S0 state, and possibly to a near-threshold quasi-bound state in the 11S0 wave.
dc.description6 pages, 5 figures. The antiproton-proton pair being in isospin one in the J/Psi decay into neutral pion-antiproton-proton, the antiproton-proton 1P1 and 3S1 waves have been replaced by the 31P1 and 33S1 ones and Figs. 1 and 2 have been replaced accordingly. Conclusions are unchanged. Most of the content of the paper is published in Phys. Rev. C72, 011001 (2005)
dc.identifierhttps://arxiv.org/abs/hep-ph/0501112
dc.identifierhttp://arxiv.org/abs/hep-ph/0501112
dc.identifierPhys.Rev.C72:011001,2005
dc.identifierdoi:10.1103/PhysRevC.72.011001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177781
dc.subjectHigh Energy Physics - Phenomenology
dc.titleAntiproton-Proton Channels in J/psi Decays
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