Lepton Scattering and Quark-Hadron Duality Studies at Jefferson Lab
At high enough energies asymptotic freedom guarantees the deep inelastic scattering cross sections to be calculated as nearly free electron-quark scattering. However, confinement guarantees that the experimentally observed final states particles are hadrons. Low-energy quark hadron duality suggests that the hadronic cross sections, when averaged over an appropriate energy range, nevertheless coincide with the naive leading-twist quark-gluon calculations. Deep inelastic inclusive scattering shows that scaling at modest Q{sup 2} and v already arises from very few resonance channels. This is reflected by the striking agreement (<10%) between data in the nucleon resonance region and the deep inelastic (W{sup 2}>4GeV{sup 2}) region for the Q{sup 2}>0.5 (GeV/c){sup 2}, known as the Bloom-Gilman duality. Electron-hadron scattering allows for further investigation of quark-hadron duality by virtue of its ability to select resonances, by tagging with either spin or flavor.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 782693
- Report Number(s):
- JLAB-PHY-01-15; DOE/ER/40150-1857
- Journal Information:
- submitted to Lepton Scattering, Hadrons and QCD, World Scientific, Journal Name: submitted to Lepton Scattering, Hadrons and QCD, World Scientific
- Country of Publication:
- United States
- Language:
- English
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