Gell-Mann: a schematic model of baryons and mesons

What changed

Proposed quark constituents with fractional quantum numbers to organize baryon and meson multiplets.

Scientific scope

The record is Gell-Mann's sole-author February 1964 Physics Letters paper. George Zweig independently developed a related constituent model in separate CERN work; later experimental evidence, QCD and modern quark taxonomy remain separate.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is Gell-Mann's sole-author February 1964 Physics Letters paper. George Zweig independently developed a related constituent model in separate CERN work; later experimental evidence, QCD and modern quark taxonomy remain separate.

Contributors

• M. Gell-Mann · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• CaltechAUTHORS record for Gell-Mann quark paper
• Saarland University-hosted copy of Gell-Mann paper

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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