Quark-hadron duality in electron-pion scatteringW. Melnitchouk
Jefferson Lab, 12000 Jefferson Avenue, Newport News, VA 23606, USA firstname.lastname@example.org
(Received: 10 February 2003 / Published online: 27 May 2003)
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.
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