Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-06
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 5 figures. Version to be published in European Physical Journal C
Scientific paper
Perturbative QCD predicts that the growth of the gluon density at high energies should saturate, forming a Color Glass Condensate (CGC), which is described in mean field approximation by the Balitsky-Kovchegov (BK) equation. In this paper we study the $\gamma \gamma$ interactions at high energies and estimate the main observables which will be probed at future linear colliders using the color dipole picture. We discuss in detail the dipole - dipole cross section and propose a new relation between this quantity and the dipole scattering amplitude. The total $\gamma \gamma$, $\gamma^{*} \gamma^{*}$ cross-sections and the real photon structure function $F_2^{\gamma}(x,Q^2)$ are calculated using the recent solution of the BK equation with running coupling constant and the predictions are compared with those obtained using phenomenological models for the dipole-dipole cross section and scattering amplitude. We demonstrate that these models are able to describe the LEP data at high energies, but predict a very different behavior for the observables at higher energies. Therefore we conclude that the study of $\gamma \gamma$ interactions can be useful to constrain the QCD dynamics.
Carvalho Fabiana
Cazaroto E. R.
Goncalves Victor P.
Kugeratski M. S.
Navarra Fernando S.
No associations
LandOfFree
Non-linear QCD dynamics in two-photon interactions at high energies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-linear QCD dynamics in two-photon interactions at high energies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-linear QCD dynamics in two-photon interactions at high energies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-299102