Total photoproduction cross-section at very high energy

TL;DR

This paper presents a QCD-based model for total photoproduction cross-sections at high energies, comparing predictions with experimental data and other models, highlighting differences at TeV energies.

Contribution

The paper introduces a unified model for hadronic and photoproduction processes incorporating soft gluon resummation, providing improved predictions at high energies.

Findings

Model aligns well with HERA data

Predicts higher cross-sections than factorization-based models at TeV energies

Predicts lower cross-sections than mini-jet-only models

Abstract

In this paper we apply to photoproduction total cross-section a model we have proposed for purely hadronic processes and which is based on QCD mini-jets and soft gluon re-summation. We compare the predictions of our model with the HERA data as well as with other models. For cosmic rays, our model predicts substantially higher cross-sections at TeV energies than models based on factorization but lower than models based on mini-jets alone, without soft gluons. We discuss the origin of this difference.