Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays

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dc.creatorBES Collaboration
dc.creatorBai, J. Z.
dc.creatorBan, Y.
dc.creatorBian, J. G.
dc.date2003-03-07
dc.date.accessioned2026-07-07T10:28:17Z
dc.date.available2026-07-07T10:28:17Z
dc.descriptionWe observe a narrow enhancement near 2mp in the invariant mass spectrum of ppbar pairs from radiative J/psi-->gamma ppbar decays. The enhancement can be fit with either an S- or P-wave Breit Wigner fuction. In the case of the S-wave fit, the peak mass is below the 2mp threshold and the full width is less than 30 MeV. These mass and width values are not consistent with the properties of any known meson resonance.
dc.description5 pages, 4 figures, submitted to Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/hep-ex/0303006
dc.identifierhttp://arxiv.org/abs/hep-ex/0303006
dc.identifierPhys.Rev.Lett.91:022001,2003
dc.identifierdoi:10.1103/PhysRevLett.91.022001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177397
dc.subjectHigh Energy Physics - Experiment
dc.titleObservation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
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