Session LB11 - Minisymposium on the Structure of the Nucleon I.
FOCUS session, Tuesday afternoon, March 23
Room 218E, GWCC

Cynthia Keppel (Hampton University / Jefferson Lab)

A newly-obtained data sample of inclusive electron-nucleon scattering from deuterium and hydrogen targets has been analyzed for precision tests of quark-hadron duality. Duality is investigated for local resonance enhancements and for broader kinematic ranges. Duality appears to be a non-trivial dynamic property of the nucleon structure function. Assuming duality, the proton magnetic form factor can be extracted from purely inelastic data to better than 15%. Higher twist contributions are found to be small, even in the low Q^2 regime of Q^2 \approx 0.5 (GeV/c)^2. The investigation yields a scaling curve from duality arguments which resembles deep-inelastic neutrino-nucleus scattering data, indicating a potential sensitivity to valence quarks only.

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