Two-photon cross-sections from the saturation model
Abstract
A saturation model for the total gamma-gamma and gamma*-gamma* cross-sections and for the real photon structure function F_2^gamma(x,Q^2) is described. The model is based on a QCD dipole picture of high energy scattering. The two-dipole cross-section is assumed to satisfy the saturation property with the saturation radius taken from the GBW analysis of the gamma*-p interaction at HERA. The model is combined with the QPM and non-pomeron reggeon contributions an it gives a very good description of the data on the gamma-gamma total cross-section, on the photon structure function F_2^gamma(x,Q^2) at low x and on the gamma*-gamma* cross-section. Production of heavy quarks in gamma-gamma collisions is also studied.
Cite
@article{arxiv.hep-ph/0206129,
title = {Two-photon cross-sections from the saturation model},
author = {J. Kwiecinski and L. Motyka and N. Timneanu},
journal= {arXiv preprint arXiv:hep-ph/0206129},
year = {2011}
}
Comments
12 pages, 6 figures, uses appolb.cls. Presented at the Cracow Epiphany Conference on Quarks and Gluons in Extreme Conditions, 3-6 January 2002, Cracow, Poland