Applications of quark-hadron duality in F2 structure function

Understand

Inclusive electron-proton and electron-deuteron inelastic cross sections have been measured at Jefferson Lab (JLab) in the resonance region, at large Bjorken x, up to 0.92, and four-momentum transfer squared Q2 up to 7.5 GeV2 in the experiment E00-116.

• These measurements are used to extend to larger x and Q2 precision, quantitative, studies of the phenomenon of quark-hadron duality.
• Our analysis confirms, both globally and locally, the apparent violation of quark-hadron duality previously observed at a Q2 of 3.5 GeV2 when resonance data are compared to structure function data created from CTEQ6M and MRST2004 parton distribution functions (PDFs).
• More importantly, our new data show that this discrepancy saturates by Q2 ~ 4 Gev2, becoming Q2 independent.