2023 Impact factor 4.2
Particles and Fields
Eur. Phys. J. C 7, 643-654
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

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 $q \overline{q}$ states, by the additive quark approach. The interference between states of different $q\bar{q}$ 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.

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