Phenomenological description of the gamma* p cross section at low Q2

A. Rostovtsev, M. G. Ryskin, R. Engel

Low Q2 photon-proton cross sections are analysed using a simple, QCD-motivated parametrisation ${\sigma }_{{\gamma }^{\star }p}\propto 1/(Q^2+Q_0^2)$, which gives a good description of the data. The…