Probing QCD dynamics in two-photon interactions at high energies

Abstract

In this paper the two-photon interactions at high energies are investigated considering different approaches for the QCD dynamics. In particular, we calculate the ${\gamma }^{\ast }{\gamma }^{\ast }$ total cross section in different theoretical approches and present a comparison among the predictions of the BFKL dynamics at leading and next-to-leading order with those from saturation physics. We analyze the possibility that the future linear colliders could discriminate between these different approaches.

Comments: 14 pages, 2 figures. Version to be published in Journal of Physics G: Nuclear and Particle Physics