2020 Impact factor 3.043
Hadrons and Nuclei
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 $\pi\to\rho$ 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