Violations of parton-hadron duality in Deep Inelastic Scattering
Physics Department, University of Virginia, VA 22904-4714, Charlottesville, USA
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I present an overview of recent data on Deep Inelastic Scattering at large Bjorken x and low invariant mass, W2, where parton-hadron duality was originally observed. I discuss the concept of parton-hadron duality from the perspective of perturbative QCD. Within this framework, I show that parton-hadron duality is broken for low values of W2, in the $\Delta$- and S11-resonance production region. A model that accounts for the anomalous scale dependence ensuing from this situation is developed.
© Società Italiana di Fisica and Springer-Verlag, 2003