The Light-flavor structure of the nucleon

Details The Light-flavor structure of the nucleon The Light-flavor structure of the nucleon

1993-10-06

arxiv.org/abs/hep-ph/9310238v2

Acta Phys. Polon. B25 (1994) 159-182

Physics

High Energy Physics

High Energy Physics - Phenomenology

plain LaTeX, 20 pages, 7 figures included in a separate uuencoded postscript file, DFTT 55/93 (minor corrections, for the reco

Scientific paper

Recent data on the Gottfried sum and less recent ones on the pion-nucleon sigma term seem to disagree with naive parton-based expectations on the light (i.e., up, down and strange) quark content of the nucleon. We show that these discrepancies are resolved if nonperturbative contributions are included in the analysis of the data. These appear both in the computation of matrix elements of operators, and in their QCD scale dependence, and depend strongly on the quantum numbers of the given state.

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