Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
Phys.Rev.Lett.91:022001,2003 We 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...
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Main Authors | , , , |
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Format | Journal Article |
Language | English |
Published |
07.03.2003
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Subjects | |
Online Access | Get full text |
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Summary: | Phys.Rev.Lett.91:022001,2003 We 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. |
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Bibliography: | UH511-1019-03 |
DOI: | 10.48550/arxiv.hep-ex/0303006 |