Eur. Phys. J. A 17, 223-234 (2003)
DOI: 10.1140/epja/i2003-10006-6

Quark-hadron duality in electron-pion scattering

W. Melnitchouk

Jefferson Lab, 12000 Jefferson Avenue, Newport News, VA 23606, USA

wmelnitc@jlab.org

(Received: 10 February 2003 / Published online: 27 May 2003)

Abstract
We explore the relationship between exclusive and inclusive electromagnetic scattering from the pion, focusing on the transition region at intermediate Q². Combining Drell-Yan data on the leading twist quark distribution in the pion with a model for the resonance region at large x, we calculate QCD moments of the pion structure function over a range of Q², and quantify the role of higher twist corrections. Using a parameterization of the pion elastic form factor and phenomenological models for the transition form factor, we further test the extent to which local duality may be valid for the pion.

PACS
13.60.Hb - Total and inclusive cross sections (including deep-inelastic processes).
12.40.Nn - Regge theory, duality, absorptive/optical models.
13.40.Gp - Electromagnetic form factors.

© Società Italiana di Fisica, Springer-Verlag 2003