Elucidating the internal structure of hadrons through direct photon production

TL;DR

This paper explores how direct photon production in high-energy collisions can be used to better understand the internal partonic structure of hadrons, with a focus on reducing theoretical uncertainties.

Contribution

It introduces methods to utilize direct photon production data to constrain parton distribution functions and describes QCD-QED corrections for improved analysis.

Findings

Enhanced understanding of partonic distributions inside protons.

Methodology for constraining hadron structure using photon production data.

Framework for accurate QCD-QED corrections in collider experiments.

Abstract

The accurate description of the internal structure of hadrons is a very challenging task. In order to compare the predictions with the highly-accurate experimental data, it is necessary to control any possible source of theoretical uncertainties. Thus, we can use the information extracted from final state measurement to constrain our knowledge about the internal structure of hadrons. In this work, we describe how direct photon production can be exploited to unveil details about the partonic distributions inside protons. Also, we explain how to describe QCD-QED corrections to hadron plus photon production at colliders, focusing on the accurate reconstruction of the partonic momentum fractions from experimentally accessible observables.