Geometric scaling in ultrahigh energy neutrinos and nonlinear perturbative QCD

摘要

The ultrahigh energy neutrino cross section is a crucial ingredient in thecalculation of the event rate in high energy neutrino telescopes. Currentlythere are several approaches which predict different behaviors for itsmagnitude for ultrahigh energies. In this contribution is presented a summaryof current predictions based on the non-linear QCD evolution equations, theso-called perturbative saturation physics. In particular, predictions are shownbased on the parton saturation approaches and the consequences of geometricscaling property at high energies are discussed. The scaling property allows ananalytical computation of the neutrino scattering on nucleon/nucleus at highenergies, providing a theoretical parameterization.