DOI 10.1007/s100529801035
The description of F2 at low Q2
A.D. Martin1 - M.G. Ryskin1,2 - A.M. Stasto1,3
1 Department of Physics, University of Durham,
Durham, DH1 3LE, UK
2 Petersburg Nuclear Physics Institute, 188350,
Gatchina, St. Petersburg, Russia
3 H. Niewodniczanski Institute of Nuclear Physics,
31-342 Krakow, Poland
Received: 1 June 1998 / Revised version: 4 September 1998 / Published online: 19 November 1998
Abstract
We analyse the data for the proton structure function F2 over the entire Q2
domain, including especially low Q2, in terms of perturbative and
non-perturbative QCD contributions. The small distance
configurations are given by perturbative QCD, while the large
distance contributions are given by the vector dominance model
and, for the higher mass 
states, by the additive
quark approach. The interference between states of different
mass (in the
perturbative contribution) is found to play a crucial role in
obtaining an excellent
description of the data throughout the whole Q2 region, including
photoproduction.
Copyright Springer-Verlag
