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QCD effective charge from quark-hadron duality

Dra. Aurore Courtoy

Este seminario se llevará a cabo en el

Sala de Conferencias 111B/302
Lunes 2 de diciembre de 2013
12:00 hrs.




We present recent developments on hadron physics in the intersection of perturbative and nonperturbative QCD in the context of the quark-hadron duality. Our framework will be the unpolarized structure function of the proton in the resonance region. We suggest that the realization of duality is related to the inclusion of nonperturbative effects at the level of the coupling constant. The outcome of our analysis is a smooth transition from perturbative to nonperturbative QCD physics, embodied in the running of the coupling constant at intermediate scales. While our approach is purely perturbative, we compare our result to the effective charge obtained in various nonperturbative schemes.