SWhat changed
In 1977 Herb and colleagues observed a strong 9.5 GeV enhancement in opposite-sign dimuons from 400 GeV proton–nucleus collisions. In a subsequent analysis with approximately 26,000 dimuon events, Innes and colleagues reported two narrow peaks around 9.4 and 10.0 GeV, while treating a possible third near 10.4 GeV as unestablished.
Scientific scope
In 1977 Herb and colleagues observed a strong 9.5 GeV enhancement in opposite-sign dimuons from 400 GeV proton–nucleus collisions. In a subsequent analysis with approximately 26,000 dimuon events, Innes and colleagues reported two narrow peaks around 9.4 and 10.0 GeV, while treating a possible third near 10.4 GeV as unestablished. The July and September submitted papers analyze the same experiment with overlapping data, not independent discoveries. The initial broad enhancement was fitted with one or two Gaussians; the later study supports at least two narrow structures subject to detector resolution and continuum modeling, and explicitly leaves the third peak unestablished. The later authors compare a new quark–antiquark bound-state interpretation with model predictions; this is not a direct measurement of free quarks. Statistical and normalization uncertainties are separate. Both sources are submitted manuscripts; formal versions, the later paper’s published erratum and raw-data reanalysis remain open. Individual authorship differs by source: R. J. Fisk is listed only on the later paper.
Evidence
The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The July and September submitted papers analyze the same experiment with overlapping data, not independent discoveries. The initial broad enhancement was fitted with one or two Gaussians; the later study supports at least two narrow structures subject to detector resolution and continuum modeling, and explicitly leaves the third peak unestablished. The later authors compare a new quark–antiquark bound-state interpretation with model predictions; this is not a direct measurement of free quarks. Statistical and normalization uncertainties are separate. Both sources are submitted manuscripts; formal versions, the later paper’s published erratum and raw-data reanalysis remain open. Individual authorship differs by source: R. J. Fisk is listed only on the later paper.
Contributors
- The named authors in the research record · SCIENCE: These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
- Observation of a Dimuon Resonance at 9.5 GeV in 400 GeV Proton-Nucleus Collisions
- Observation of Structure in the Upsilon Region
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