High density effects in ultrahigh neutrino interactions

TL;DR

This paper investigates how high parton density effects at ultra-high energies influence neutrino interactions with nuclei, comparing linear and non-linear QCD models to understand their impact on cross sections and inelasticity.

Contribution

It provides a comparative analysis of linear DGLAP and non-linear Color Glass Condensate models for ultra-high energy neutrino-nucleus interactions, highlighting the significance of high density effects.

Findings

Non-linear effects reduce the average inelasticity.

Predictions for neutrino-nucleus cross sections are similar across models at ultra-high energies.

High density effects are crucial for accurate modeling of ultra-high energy neutrino interactions.

Abstract

The high parton density present at high energies and large nuclei is expected to modify the lepton - hadron cross section and the associated observables. In this paper we analyse the impact of the high density effects in the average inelasticity and the neutrino - nucleus cross section at ultra high energies. We compare the predictions associated to the linear DGLAP dynamics with those from the Color Glass Condensate formalism, which includes non-linear effects. Our results demonstrated that the non-linear effects reduce the average inelasticity and that the predictions of the distinct approaches for the neutrino - nucleus cross section at ultra-high energies are similar.